/* ==========================================================================
   CSS DESIGN SYSTEM: Calculador
   ========================================================================== */

/* Google Font: Outfit */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');

/* Color variables for Light Mode (Default) */
:root {
    --bg-primary: #f4f6fa;
    --bg-secondary: #ffffff;
    --bg-glow-1: rgba(99, 102, 241, 0.08); /* indigo */
    --bg-glow-2: rgba(244, 63, 94, 0.08);  /* rose */
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    --border-color: rgba(226, 232, 240, 0.9);
    --card-border: rgba(255, 255, 255, 0.7);
    --card-shadow: 0 10px 30px -10px rgba(100, 116, 139, 0.12), 
                   0 1px 3px rgba(100, 116, 139, 0.04);
    
    --input-bg: #f8fafc;
    --input-border: #e2e8f0;
    --input-focus: #6366f1;
    
    --btn-primary-bg: linear-gradient(135deg, #4f46e5 0%, #6366f1 100%);
    --btn-primary-text: #ffffff;
    --btn-secondary-bg: #f1f5f9;
    --btn-secondary-text: #334155;
    --btn-secondary-hover: #e2e8f0;
    
    /* Card Gradients (Vibrant & beautiful) */
    --grad-sunset: linear-gradient(135deg, #ff6b6b 0%, #ff8e53 100%);
    --grad-ocean: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    --grad-forest: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --grad-aurora: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
    --grad-fire: linear-gradient(135deg, #f97316 0%, #ef4444 100%);
    --grad-bloom: linear-gradient(135deg, #f43f5e 0%, #fb7185 100%);
}

/* Color variables override for Dark Mode */
[data-theme="dark"] {
    --bg-primary: #090d16;
    --bg-secondary: #111827;
    --bg-glow-1: rgba(99, 102, 241, 0.2);
    --bg-glow-2: rgba(236, 72, 153, 0.15);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --border-color: rgba(30, 41, 59, 0.8);
    --card-border: rgba(255, 255, 255, 0.05);
    --card-shadow: 0 15px 35px -15px rgba(0, 0, 0, 0.4), 
                   0 1px 3px rgba(0, 0, 0, 0.25);
    
    --input-bg: #1e293b;
    --input-border: #334155;
    --input-focus: #818cf8;
    
    --btn-primary-bg: linear-gradient(135deg, #6366f1 0%, #818cf8 100%);
    --btn-primary-text: #ffffff;
    --btn-secondary-bg: #1e293b;
    --btn-secondary-text: #e2e8f0;
    --btn-secondary-hover: #334155;
    
    /* Card Gradients for Dark mode (Deeply saturated) */
    --grad-sunset: linear-gradient(135deg, #ef4444 0%, #f97316 100%);
    --grad-ocean: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
    --grad-forest: linear-gradient(135deg, #059669 0%, #047857 100%);
    --grad-aurora: linear-gradient(135deg, #7c3aed 0%, #db2777 100%);
    --grad-fire: linear-gradient(135deg, #ea580c 0%, #dc2626 100%);
    --grad-bloom: linear-gradient(135deg, #e11d48 0%, #f43f5e 100%);
}

/* ==========================================================================
   RESET & GLOBAL STYLES
   ========================================================================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Outfit', sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    position: relative;
    overflow-x: hidden;
}



/* Ambient glow blobs in background */
.bg-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(120px);
    z-index: -1;
    pointer-events: none;
    opacity: 0.8;
    /* transition: background-color 0.5s ease; */ /* Removed to prevent paint lag during theme switch */
}
.bg-glow-1 {
    top: -200px;
    left: 10%;
    background-color: var(--bg-glow-1);
}
.bg-glow-2 {
    bottom: 10%;
    right: 10%;
    background-color: var(--bg-glow-2);
}

.app-container {
    width: 100%;
    max-width: 960px;
    min-height: 100vh;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 28px;
}

/* ==========================================================================
   HEADER SECTION
   ========================================================================== */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background-color: rgba(255, 255, 255, 0.35);
    backdrop-filter: blur(16px);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    box-shadow: var(--card-shadow);
}

[data-theme="dark"] .app-header {
    background-color: rgba(30, 41, 59, 0.35);
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 14px;
    color: var(--input-focus);
}

.header-logo svg {
    color: var(--input-focus);
    transition: transform 0.4s ease;
}

.header-logo:hover svg {
    transform: rotate(10deg) scale(1.05);
}

.brand-name {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.5px;
    line-height: 1.1;
}

.header-text p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Theme Toggle Button */
.theme-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 30px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    box-shadow: var(--card-shadow);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-btn:hover {
    transform: translateY(-2px);
    border-color: var(--input-focus);
    box-shadow: 0 5px 15px rgba(99, 102, 241, 0.12);
}

.theme-btn:active {
    transform: translateY(0);
}

/* Icons toggle behavior */
[data-theme="dark"] .sun-icon { display: none; }
[data-theme="dark"] .moon-icon { display: block; }
.sun-icon { display: block; color: #f59e0b; }
.moon-icon { display: none; color: #a5b4fc; }

/* ==========================================================================
   DYNAMIC COUNTDOWNS ROW (TOP)
   ========================================================================== */
.live-countdowns-section {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    width: 100%;
    max-width: 760px;
    margin: 0 auto;
}

@media (max-width: 650px) {
    .live-countdowns-section {
        grid-template-columns: 1fr;
        gap: 10px;
    }
}

.countdown-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 14px 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.cd-title {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 2px;
}

.cd-timer {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--text-primary);
    font-family: monospace;
    letter-spacing: 0.5px;
}

/* ==========================================================================
   MAIN CONTENT & CENTRAL HERO CALCULATOR
   ========================================================================== */
.app-main {
    display: flex;
    flex-direction: column;
    gap: 32px;
    width: 100%;
}

.calculator-hero-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 32px;
    box-shadow: var(--card-shadow);
    transition: background-color 0.2s ease, border-color 0.2s ease;
    width: 100%;
    max-width: 760px;
    margin: 0 auto;
}

.main-calculator-heading {
    font-size: 1.5rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 24px;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

/* Tabs styles */
.calculator-tabs {
    display: flex;
    width: 100%;
    border-bottom: 2px solid var(--border-color);
    gap: 16px;
    margin-bottom: 24px;
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    margin-bottom: -2px;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--input-focus);
    border-bottom: 2px solid var(--input-focus);
}

.tab-btn svg {
    transition: transform 0.3s ease;
}
.tab-btn:hover svg {
    transform: scale(1.1);
}

/* Advanced Options Row */
.calculator-options-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    align-items: center;
    margin-bottom: 24px;
    background-color: var(--bg-primary);
    padding: 16px 20px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

@media (max-width: 550px) {
    .calculator-options-row {
        grid-template-columns: 1fr;
        gap: 14px;
    }
}

.app-select {
    width: 100%;
    padding: 12px 16px;
    border-radius: 10px;
    border: 1.5px solid var(--input-border);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 600;
    outline: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

[data-theme="dark"] .app-select {
    background-color: var(--input-bg);
}

.app-select:focus {
    border-color: var(--input-focus);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.12);
}

/* Toggle Switch Styles */
.checkbox-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0 !important;
}

.switch-text-label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.switch-container {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 26px;
    flex-shrink: 0;
}

.switch-container input {
    opacity: 0;
    width: 0;
    height: 0;
}

.switch-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--input-border);
    transition: .3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 34px;
}

.switch-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

input:checked + .switch-slider {
    background-color: var(--input-focus);
}

input:checked + .switch-slider:before {
    transform: translateX(22px);
}

/* Panels */
.calc-panel {
    display: none;
    animation: fadeIn 0.4s ease;
}

.calc-panel.active {
    display: block;
}

.panel-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.5;
}

/* Presets block */
.presets-container {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.presets-label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.presets-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.preset-btn {
    padding: 6px 12px;
    border-radius: 30px;
    border: 1px solid var(--border-color);
    background-color: var(--input-bg);
    color: var(--text-primary);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
}

.preset-btn:hover {
    border-color: var(--input-focus);
    background-color: var(--bg-secondary);
    transform: translateY(-2px);
}

/* Form Styles */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 16px;
}

@media (max-width: 600px) {
    .form-row {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

input[type="text"],
input[type="date"] {
    width: 100%;
    padding: 14px 18px;
    border-radius: 12px;
    border: 1.5px solid var(--input-border);
    background-color: var(--input-bg);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 500;
    outline: none;
    transition: all 0.3s ease;
}

input[type="text"]::placeholder {
    color: var(--text-muted);
}

input[type="text"]:focus,
input[type="date"]:focus {
    border-color: var(--input-focus);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.12);
    background-color: var(--bg-secondary);
}

.large-date-input {
    font-size: 1.1rem;
    font-weight: 600;
}

/* Giant Result display */
.live-result-display {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 30px 24px;
    margin: 20px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.result-value-wrapper {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 8px;
}

.result-number {
    font-size: clamp(3rem, 10vw, 4.5rem);
    font-weight: 800;
    letter-spacing: -2px;
    color: var(--input-focus);
    line-height: 1;
}

.result-unit {
    font-size: 1.3rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-secondary);
}

.result-summary {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-top: 8px;
    font-weight: 500;
    line-height: 1.4;
    max-width: 500px;
}

/* Detailed Outputs Grid */
.detailed-outputs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 24px;
}

@media (max-width: 500px) {
    .detailed-outputs-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.output-cell {
    background-color: var(--input-bg);
    border: 1.5px solid var(--border-color);
    border-radius: 12px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.cell-title {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.cell-value {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--text-primary);
}

/* Action Buttons */
.calculator-actions-buttons {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.btn-action-outline {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border: 1.5px solid var(--input-border);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
}

[data-theme="dark"] .btn-action-outline {
    background-color: var(--input-bg);
}

.btn-action-outline:hover {
    border-color: var(--input-focus);
    color: var(--input-focus);
    background-color: rgba(99, 102, 241, 0.04);
}

.btn-action-outline svg {
    flex-shrink: 0;
}

/* Save Form Details */
.save-calculator-result {
    border-top: 1.5px solid var(--border-color);
    padding-top: 20px;
    width: 100%;
}

.save-details {
    width: 100%;
}

.save-details summary {
    list-style: none;
}
.save-details summary::-webkit-details-marker {
    display: none;
}

.btn-save-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--input-focus);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 6px 12px;
    border-radius: 8px;
    background-color: transparent;
    user-select: none;
    transition: background-color 0.2s ease;
}

.btn-save-toggle:hover {
    background-color: rgba(99, 102, 241, 0.06);
}

.save-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 16px;
    padding: 20px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    animation: slideDown 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

/* Color grid picker */
.color-picker-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
}

.color-option {
    cursor: pointer;
    position: relative;
}

.color-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.color-preview {
    display: block;
    width: 100%;
    aspect-ratio: 1;
    border-radius: 8px;
    border: 2px solid transparent;
    transition: all 0.2s ease;
}

.sunset .color-preview { background: var(--grad-sunset); }
.ocean .color-preview { background: var(--grad-ocean); }
.forest .color-preview { background: var(--grad-forest); }
.aurora .color-preview { background: var(--grad-aurora); }
.fire .color-preview { background: var(--grad-fire); }

.color-option input[type="radio"]:checked + .color-preview {
    border-color: var(--text-primary);
    transform: scale(1.1);
    box-shadow: 0 4px 10px rgba(0,0,0,0.12);
}

/* Primary Button */
.btn-primary {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 12px;
    background: var(--btn-primary-bg);
    color: var(--btn-primary-text);
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.35);
    filter: brightness(1.05);
}

.btn-primary:active {
    transform: translateY(0);
}

/* ==========================================================================
   HISTORY SECTION
   ========================================================================== */
.history-section {
    width: 100%;
    max-width: 760px;
    margin: 0 auto;
    background-color: var(--bg-secondary);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 20px 24px;
    box-shadow: var(--card-shadow);
}

.history-section.hidden {
    display: none;
}

.history-section h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.history-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.history-chip {
    padding: 6px 12px;
    border-radius: 20px;
    border: 1.5px solid var(--border-color);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.history-chip:hover {
    border-color: var(--input-focus);
    background-color: rgba(99, 102, 241, 0.08);
}

/* ==========================================================================
   SAVED COUNTERS LIST (SECONDARY SECTION)
   ========================================================================== */
.saved-counters-section {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 8px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 8px;
    border-bottom: 1.5px solid var(--border-color);
}

.section-header h2 {
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: -0.4px;
}

.counter-badge {
    background-color: var(--btn-secondary-bg);
    color: var(--btn-secondary-text);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 700;
}

.counters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr));
    gap: 20px;
}

/* Card item */
.counter-card-item {
    position: relative;
    border-radius: 20px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 180px;
    color: #ffffff;
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
                box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeIn 0.4s ease-out;
}

.counter-card-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.15);
}

.counter-card-item.theme-sunset { background: var(--grad-sunset); }
.counter-card-item.theme-ocean { background: var(--grad-ocean); }
.counter-card-item.theme-forest { background: var(--grad-forest); }
.counter-card-item.theme-aurora { background: var(--grad-aurora); }
.counter-card-item.theme-fire { background: var(--grad-fire); }

.counter-card-item::after {
    content: '';
    position: absolute;
    width: 140px;
    height: 140px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    top: -40px;
    right: -40px;
    pointer-events: none;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    z-index: 1;
}

.card-title {
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.2px;
    word-break: break-word;
}

.btn-delete-card {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    width: 28px;
    height: 28px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #ffffff;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.btn-delete-card:hover {
    background: rgba(255, 255, 255, 0.35);
    transform: scale(1.1);
}

.card-body {
    margin: 12px 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    z-index: 1;
}

.days-number {
    font-size: 3.25rem;
    font-weight: 800;
    letter-spacing: -2px;
    line-height: 0.9;
}

.days-label {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    opacity: 0.9;
    margin-top: 4px;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.72rem;
    font-weight: 500;
    opacity: 0.85;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding-top: 10px;
    margin-top: auto;
    z-index: 1;
}

.event-date-display {
    display: flex;
    align-items: center;
    gap: 4px;
}

.status-badge {
    padding: 2px 8px;
    border-radius: 12px;
    background-color: rgba(255, 255, 255, 0.25);
    font-weight: 600;
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px 24px;
    text-align: center;
    background-color: var(--bg-secondary);
    border: 2px dashed var(--border-color);
    border-radius: 20px;
    color: var(--text-secondary);
}

.empty-state.hidden {
    display: none;
}

.empty-illustrations {
    color: var(--text-muted);
    margin-bottom: 12px;
}

.empty-state h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.empty-state p {
    font-size: 0.85rem;
    max-width: 340px;
    line-height: 1.45;
}

/* ==========================================================================
   SEO ARTICLES & DYNAMIC CONTENT SECTION
   ========================================================================== */
.seo-content-section {
    border-top: 1.5px solid var(--border-color);
    padding-top: 32px;
    margin-top: 16px;
    width: 100%;
}

.seo-internal-links {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 32px;
    background-color: var(--bg-secondary);
    padding: 12px 18px;
    border-radius: 14px;
    border: 1px solid var(--border-color);
    box-shadow: var(--card-shadow);
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.links-title {
    font-size: 0.8rem;
    font-weight: 800;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.link-chip {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--input-focus);
    background-color: rgba(99, 102, 241, 0.06);
    padding: 6px 12px;
    border-radius: 20px;
    text-decoration: none;
    transition: all 0.2s ease;
}

.link-chip:hover {
    background-color: var(--input-focus);
    color: white;
}

.seo-article {
    max-width: 800px;
    margin: 0 auto;
    color: var(--text-secondary);
    line-height: 1.6;
}

.seo-article h2 {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-top: 36px;
    margin-bottom: 12px;
    letter-spacing: -0.4px;
}

.seo-article p {
    margin-bottom: 16px;
    font-size: 0.95rem;
}

.seo-article strong {
    color: var(--text-primary);
}

.seo-article ul {
    margin-left: 20px;
    margin-bottom: 20px;
}

.seo-article li {
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.seo-article code {
    background-color: var(--bg-primary);
    padding: 2px 6px;
    border-radius: 6px;
    font-family: monospace;
    color: var(--input-focus);
    font-size: 0.88rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

/* Dynamic SEO Data Table */
.seo-table-container {
    margin: 28px 0;
}

.dynamic-table-wrapper {
    width: 100%;
    overflow-x: auto;
    border-radius: 14px;
    border: 1px solid var(--border-color);
    box-shadow: var(--card-shadow);
    margin-top: 14px;
}

.seo-data-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--bg-secondary);
    text-align: left;
    min-width: 500px;
    transition: background-color 0.2s ease;
}

.seo-data-table th, 
.seo-data-table td {
    padding: 12px 16px;
    font-size: 0.88rem;
    border-bottom: 1px solid var(--border-color);
}

.seo-data-table th {
    background-color: var(--bg-primary);
    font-weight: 700;
    color: var(--text-primary);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.seo-data-table td {
    color: var(--text-secondary);
}

.seo-data-table tr:last-child td {
    border-bottom: none;
}

.seo-data-table tr:hover td {
    background-color: rgba(99, 102, 241, 0.015);
}

.dyn-text {
    font-weight: 700;
    color: var(--input-focus);
}

/* ==========================================================================
   FOOTER SECTION
   ========================================================================== */
.app-footer {
    text-align: center;
    padding: 24px 0 12px 0;
    margin-top: auto;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ==========================================================================
   KEYFRAME ANIMATIONS
   ========================================================================== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   CONTACT FORM & ADMIN INBOX STYLES
   ========================================================================== */
.contact-section {
    width: 100%;
    max-width: 760px;
    margin: 0 auto;
    background-color: var(--bg-secondary);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 24px;
    box-shadow: var(--card-shadow);
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.contact-section h3 {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.section-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.5;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-form textarea:focus {
    border-color: var(--input-focus);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.12);
    background-color: var(--bg-secondary);
}

.contact-success-msg {
    margin-top: 12px;
    padding: 12px;
    background-color: rgba(16, 185, 129, 0.15);
    color: #10b981;
    border: 1.5px solid rgba(16, 185, 129, 0.3);
    border-radius: 10px;
    font-size: 0.88rem;
    font-weight: 600;
    text-align: center;
    animation: fadeIn 0.3s ease;
}

.contact-success-msg.hidden {
    display: none;
}

/* ==========================================================================
   PREGNANCY CALCULATOR SPECIFIC STYLES
   ========================================================================== */
.theme-bloom {
    color: #ffffff;
    background: var(--grad-bloom) !important;
}

/* Progress bar container */
.progress-bar-container {
    width: 100%;
    margin-top: 20px;
    background-color: var(--input-border);
    height: 12px;
    border-radius: 6px;
    overflow: hidden;
    position: relative;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
}

.progress-bar-fill {
    height: 100%;
    background: var(--grad-bloom);
    width: 0%;
    border-radius: 6px;
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-bar-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.72rem;
    color: var(--text-secondary);
    font-weight: 700;
    margin-top: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Trimestre badges */
.trimestre-badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
    background-color: var(--bg-glow-2);
    color: #f43f5e;
    margin-top: 8px;
    border: 1px solid rgba(244, 63, 94, 0.15);
}

[data-theme="dark"] .trimestre-badge {
    background-color: rgba(244, 63, 94, 0.15);
    color: #fb7185;
}

/* Medical Warning Note */
.medical-warning-box {
    margin-top: 24px;
    padding: 16px;
    border-radius: 14px;
    background-color: var(--bg-primary);
    border: 1.5px solid var(--border-color);
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.warning-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.warning-text {
    font-size: 0.8rem;
    line-height: 1.5;
    color: var(--text-secondary);
}

/* Accordion Week-by-Week */
.weeks-accordion {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 14px;
}

.week-item {
    border: 1.5px solid var(--border-color);
    border-radius: 12px;
    background-color: var(--bg-secondary);
    overflow: hidden;
    transition: all 0.3s ease;
}

.week-header {
    width: 100%;
    padding: 14px 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    text-align: left;
    outline: none;
    transition: background-color 0.2s ease;
}

.week-header:hover {
    background-color: var(--bg-primary);
}

.week-icon {
    font-size: 1.1rem;
    transition: transform 0.3s ease;
}

.week-item.active {
    border-color: #f43f5e;
    box-shadow: 0 4px 15px rgba(244, 63, 94, 0.08);
}

.week-item.active .week-icon {
    transform: rotate(90deg);
}

.week-body {
    display: none;
    padding: 16px 18px;
    border-top: 1.5px solid var(--border-color);
    background-color: var(--bg-secondary);
    animation: slideDown 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.week-item.active .week-body {
    display: block;
}

.baby-size-card {
    display: flex;
    align-items: center;
    gap: 12px;
    background-color: var(--bg-primary);
    padding: 10px 14px;
    border-radius: 10px;
    margin-bottom: 12px;
    border: 1px solid var(--border-color);
}

.baby-size-emoji {
    font-size: 1.8rem;
}

.baby-size-details {
    display: flex;
    flex-direction: column;
}

.size-label {
    font-size: 0.68rem;
    text-transform: uppercase;
    font-weight: 700;
    color: var(--text-muted);
}

.size-val {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text-primary);
}

.week-symptoms-title {
    font-size: 0.78rem;
    text-transform: uppercase;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.week-description {
    font-size: 0.88rem;
    line-height: 1.55;
    color: var(--text-secondary);
}

/* Collapsed accordion state: smoothly transition the non-active week cards */
.weeks-accordion .week-item:not(.active) {
    max-height: 80px; /* An inactive card header height is around 50-60px */
    opacity: 1;
    margin-top: 0;
    margin-bottom: 0;
    border-width: 1.5px;
    transform: scale(1) translateY(0);
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
                opacity 0.25s ease-out, 
                transform 0.25s ease-out,
                margin-top 0.4s ease-out,
                margin-bottom 0.4s ease-out,
                border-width 0.4s ease-out,
                padding 0.4s ease-out;
    overflow: hidden;
}

.weeks-accordion.collapsed-accordion .week-item:not(.active) {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
    margin-bottom: -8px; /* Offset the flex gap of 8px */
    border-width: 0;
    pointer-events: none;
    transform: scale(0.96) translateY(-6px);
}


/* ==========================================================================================
   RESPONSIVE DESIGN OPTIMIZATIONS (PC, Tablets, iOS, Android)
   ========================================================================== */

/* Tablets & Small Laptops (iPad, tablets) */
@media (max-width: 768px) {
    .app-container {
        padding: 16px;
        gap: 20px;
    }
    .calculator-hero-card {
        padding: 24px;
    }
    .live-countdowns-section {
        gap: 12px;
    }
}

/* Mobile Devices (iPhone, Samsung Galaxy, Pixel, etc.) */
@media (max-width: 480px) {
    .app-container {
        padding: 12px;
        gap: 16px;
    }
    
    .app-header {
        padding: 12px 16px;
        border-radius: 16px;
    }
    
    .brand-name {
        font-size: 1.3rem;
    }
    
    .header-logo {
        gap: 10px;
    }
    
    /* Sleek icon-only toggle on small viewports */
    #theme-status-text {
        display: none;
    }
    
    .theme-btn {
        padding: 10px;
        border-radius: 50%;
        width: 38px;
        height: 38px;
        justify-content: center;
        align-items: center;
    }
    
    /* Expand contents inside calculator hero */
    .calculator-hero-card {
        padding: 16px;
        border-radius: 20px;
    }
    
    .main-calculator-heading {
        font-size: 1.25rem;
        margin-bottom: 16px;
    }
    
    /* Full-width tab buttons */
    .calculator-tabs {
        gap: 8px;
        margin-bottom: 16px;
    }
    
    .tab-btn {
        flex: 1;
        justify-content: center;
        padding: 10px 4px;
        font-size: 0.82rem;
    }
    
    .calculator-options-row {
        padding: 12px;
        border-radius: 12px;
        gap: 10px;
    }
    
    .switch-text-label {
        font-size: 0.72rem;
    }
    
    .presets-container {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .presets-label {
        font-size: 0.75rem;
    }
    
    .live-result-display {
        padding: 20px 14px;
        margin: 14px 0;
        border-radius: 14px;
    }
    
    .result-unit {
        font-size: 1rem;
    }
    
    .result-summary {
        font-size: 0.85rem;
        margin-top: 4px;
    }
    
    /* Grid layout for action buttons to avoid wrap mess */
    .calculator-actions-buttons {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 8px;
        margin-bottom: 20px;
    }
    
    .btn-action-outline {
        width: 100%;
        justify-content: center;
        padding: 10px 8px;
        font-size: 0.75rem;
        border-radius: 8px;
    }
    
    /* Saved cards layout on mobile */
    .counters-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .counter-card-item {
        min-height: 160px;
        padding: 18px;
    }
    
    .days-number {
        font-size: 2.8rem;
    }
    
    /* SEO Dynamic Table scrollable wrapper */
    .seo-data-table th, 
    .seo-data-table td {
        padding: 10px 12px;
        font-size: 0.8rem;
    }
    
    .seo-article h2 {
        font-size: 1.15rem;
        margin-top: 24px;
    }
    
    .seo-article p,
    .seo-article li {
        font-size: 0.88rem;
    }
}

/* Navigation menu for other applications (CronoDiario) */
.other-apps-nav {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
    width: 100%;
    text-align: center;
}

.other-apps-title {
    font-size: 0.8rem;
    font-weight: 800;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1.2px;
}

.other-apps-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    width: 100%;
}

.other-app-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 30px;
    border: 1.5px solid var(--border-color);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.88rem;
    box-shadow: var(--card-shadow);
    transition: background-color 0.22s ease-in-out, border-color 0.22s ease-in-out, color 0.22s ease-in-out, box-shadow 0.22s ease-in-out, transform 0.2s ease;
}

.other-app-btn:hover {
    transform: translateY(-2px);
    border-color: var(--input-focus);
    color: var(--input-focus);
    background-color: var(--bg-primary);
}