/* ARCHIVO: assets/css/main.css */
/* ===================================
   IMPULSO DIGITAL - MAIN STYLES
   Mobile First Approach
   =================================== */

/* ANTI-OVERFLOW GLOBAL */
* {
    max-width: 100%;
}

html,
body {
    width: 100%;
    overflow-x: hidden;
}

/* ===================================
   1. HEADER & NAVIGATION
   =================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(248, 250, 252, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

[data-theme="dark"] .header {
    background-color: rgba(11, 17, 32, 0.9);
}

/* Header con scroll - sombra más pronunciada */
.header--scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .header--scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.nav__logo img {
    height: 40px;
    width: auto;
    transition: transform 0.3s ease;
}

.nav__logo:hover img {
    transform: scale(1.05);
}

.nav__actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle,
.lang-toggle {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 0.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    color: var(--text-primary);
}

.theme-toggle {
    width: 40px;
    height: 40px;
}

.lang-toggle {
    min-width: 50px;
    font-weight: 600;
    font-size: 0.875rem;
}

.theme-toggle:hover,
.lang-toggle:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--color-primary);
}

.theme-icon {
    width: 20px;
    height: 20px;
}

.theme-icon--dark {
    display: none;
}

[data-theme="dark"] .theme-icon--light {
    display: none;
}

[data-theme="dark"] .theme-icon--dark {
    display: block;
}

/* Language Selector Dropdown */
.lang-selector {
    position: relative;
}

.lang-selector__button {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    color: var(--text-primary);
    min-width: 100px;
}

.lang-selector__button:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--color-primary);
}

.lang-name {
    font-size: 0.875rem;
    font-weight: 500;
}

.lang-name--selected {
    font-weight: 600;
}

.lang-selector__arrow {
    width: 14px;
    height: 14px;
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.lang-selector__button[aria-expanded="true"] .lang-selector__arrow {
    transform: rotate(180deg);
}

.lang-selector__dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    box-shadow: var(--shadow-xl);
    min-width: 140px;
    padding: 0.5rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1100;
}

.lang-selector__dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-option {
    width: 100%;
    background: transparent;
    border: none;
    border-radius: 0.5rem;
    padding: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-primary);
    position: relative;
}

.language-option:hover {
    background-color: var(--bg-tertiary);
}

.check-icon {
    width: 16px;
    height: 16px;
    opacity: 0;
    transition: opacity 0.2s ease;
    color: var(--color-primary);
    flex-shrink: 0;
}

.language-option.active .check-icon {
    opacity: 1;
}

.language-option.active {
    background-color: rgba(59, 130, 246, 0.1);
}

[data-theme="dark"] .language-option.active {
    background-color: rgba(96, 165, 250, 0.15);
}

/* ===================================
   2. HERO SECTION
   =================================== */
.hero {
    padding-top: 80px;
}

.hero__container {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero__content {
    max-width: 800px;
    margin: 0 auto;
}

.hero__title {
    font-size: 2.5rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.6;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 0.75rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.cta-button--primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(59, 130, 246, 0.4);
}

.cta-button--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(59, 130, 246, 0.5);
}

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

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-indicator__line {
    width: 2px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-primary), transparent);
    animation: scrollPulse 2s infinite;
}

@keyframes scrollPulse {

    0%,
    100% {
        opacity: 0;
        transform: translateY(0);
    }

    50% {
        opacity: 1;
        transform: translateY(10px);
    }
}

/* ===================================
   3. SECTION COMMONS
   =================================== */
section {
    padding: 5rem 0;
    overflow-x: hidden;
    width: 100%;
    max-width: 100%;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    text-align: center;
    max-width: 600px;
    margin: 0 auto 3rem;
}

/* ===================================
   4. COMPARISON SECTION
   =================================== */
.comparison {
    background-color: var(--bg-secondary);
}

.comparison__grid {
    display: grid;
    gap: 2rem;
    margin-top: 3rem;
}

.comparison__card {
    background-color: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 1.5rem;
    padding: 2.5rem;
    transition: all 0.3s ease;
}

.comparison__card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.comparison__card--problem {
    border-color: #EF4444;
}

.comparison__card--solution {
    border-color: var(--color-accent);
}

.comparison__icon {
    width: 64px;
    height: 64px;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.comparison__icon--problem {
    background: linear-gradient(135deg, #FEE2E2 0%, #FECACA 100%);
    color: #DC2626;
}

[data-theme="dark"] .comparison__icon--problem {
    background: linear-gradient(135deg, #7F1D1D 0%, #991B1B 100%);
    color: #FCA5A5;
}

.comparison__icon--solution {
    background: linear-gradient(135deg, #D1FAE5 0%, #A7F3D0 100%);
    color: #059669;
}

[data-theme="dark"] .comparison__icon--solution {
    background: linear-gradient(135deg, #064E3B 0%, #065F46 100%);
    color: #6EE7B7;
}

.comparison__title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.comparison__list {
    list-style: none;
}

.comparison__list li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    color: var(--text-secondary);
}

.comparison__list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    border-radius: 50%;
}

.comparison__card--problem .comparison__list li::before {
    background-color: #FEE2E2;
    border: 2px solid #DC2626;
}

.comparison__card--solution .comparison__list li::before {
    background-color: #D1FAE5;
    border: 2px solid #059669;
}

/* ===================================
   5. SERVICES SECTION
   =================================== */
.services__grid {
    display: grid;
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 1.5rem;
    padding: 2.5rem;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
}

.service-card__icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: white;
    transition: all 0.3s ease;
}

.service-card:hover .service-card__icon {
    transform: rotate(5deg) scale(1.1);
}

.service-card__title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.service-card__description {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===================================
   6. ROADMAP SECTION
   =================================== */
.roadmap {
    background-color: var(--bg-secondary);
}

.roadmap__steps {
    max-width: 800px;
    margin: 3rem auto 0;
    position: relative;
}

/* Connecting Line */
.roadmap__steps::before {
    content: '';
    position: absolute;
    left: 31px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-primary), var(--color-accent));
}

.roadmap__step {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    position: relative;
}

.roadmap__number {
    flex-shrink: 0;
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    box-shadow: 0 4px 14px 0 rgba(59, 130, 246, 0.4);
    z-index: 1;
}

.roadmap__content {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 1.5rem;
    flex: 1;
    transition: all 0.3s ease;
}

.roadmap__step:hover .roadmap__content {
    transform: translateX(10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.roadmap__step-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.roadmap__step-desc {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===================================
   7. CALENDAR SECTION
   =================================== */
.calendar-section {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-tertiary) 100%);
}

.calendar-container {
    display: grid;
    gap: 3rem;
    margin-top: 3rem;
}

.calendar-wrapper {
    background-color: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 1.5rem;
    padding: 2rem;
    box-shadow: var(--shadow-xl);
}

.calendar-input {
    width: 100%;
    padding: 1rem;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 0.75rem;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.calendar-input:hover,
.calendar-input:focus {
    border-color: var(--color-primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.calendar-info {
    display: grid;
    gap: 1.5rem;
}

.info-card {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    transition: all 0.3s ease;
}

.info-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.info-card svg {
    flex-shrink: 0;
    color: var(--color-primary);
}

.info-card h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.info-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Calendar Inline */
.calendar-inline {
    width: 100%;
}

/* Mobile-first: Stack vertically */
.calendar-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Tablet+: Side by side */
@media (min-width: 768px) {
    .calendar-container {
        flex-direction: row;
        align-items: flex-start;
    }

    .calendar-wrapper {
        flex: 0 0 auto;
        min-width: 320px;
    }

    .time-slots-wrapper {
        flex: 1;
    }
}

/* Calendar Form */
.calendar-form {
    margin-top: 3rem;
    background-color: var(--bg-secondary);
    border: 2px solid var(--color-primary);
    border-radius: 1.5rem;
    padding: 2.5rem;
}

.calendar-form h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    text-align: center;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    font-family: inherit;
    border: 2px solid #e2e8f0;
    border-radius: 0.75rem;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: all 0.3s ease;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.form-group input:hover,
.form-group textarea:hover,
.form-group select:hover {
    border-color: #cbd5e1;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1), 0 2px 8px rgba(0, 0, 0, 0.08);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Dark Mode Form Inputs */
[data-theme="dark"] .form-group input,
[data-theme="dark"] .form-group textarea,
[data-theme="dark"] .form-group select {
    border-color: rgba(255, 255, 255, 0.15);
    background-color: rgba(255, 255, 255, 0.05);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .form-group input:hover,
[data-theme="dark"] .form-group textarea:hover,
[data-theme="dark"] .form-group select:hover {
    border-color: rgba(255, 255, 255, 0.25);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .form-group input:focus,
[data-theme="dark"] .form-group textarea:focus,
[data-theme="dark"] .form-group select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2), 0 2px 8px rgba(0, 0, 0, 0.4);
}

/* ===================================
   TIME SLOTS SECTION
   =================================== */

.time-slots-wrapper {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 1rem;
    padding: 1.25rem;
    margin-bottom: 2rem;
    animation: slideDown 0.4s ease-out;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.selected-date-display {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    margin-bottom: 1rem;
    padding-bottom: 0.875rem;
    border-bottom: 2px solid var(--border-color);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1rem;
}

.selected-date-display svg {
    color: var(--color-primary);
    flex-shrink: 0;
}

/* Mobile-first Time Slots Grid */
.time-slots-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    /* 2 columnas en móvil */
    gap: 0.625rem;
    margin-bottom: 1.25rem;
}

.time-slot-card {
    position: relative;
    padding: 1.125rem 0.75rem;
    background: var(--bg-primary);
    border: 3px solid #e2e8f0;
    /* Borde más grueso */
    border-radius: 0.75rem;
    text-align: center;
    font-weight: 700;
    /* Más bold */
    font-size: 1.0625rem;
    /* Ligeramente más grande */
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
    user-select: none;
}

.time-slot-card:active {
    transform: scale(0.97);
    /* Feedback táctil en móvil */
}

.time-slot-card:hover:not(.disabled) {
    border-color: var(--color-primary);
    background: rgba(99, 102, 241, 0.08);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(99, 102, 241, 0.2);
}

.time-slot-card.selected {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    font-weight: 800;
    /* Extra bold cuando está seleccionado */
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
    transform: scale(1.05);
    /* Ligeramente más grande */
}

.time-slot-card.selected::before {
    content: '✓';
    position: absolute;
    top: 4px;
    right: 6px;
    font-size: 0.875rem;
    font-weight: 900;
    color: white;
    opacity: 0.9;
}

.time-slot-card.disabled {
    opacity: 0.35;
    cursor: not-allowed;
    background: var(--bg-tertiary);
    color: var(--text-tertiary);
    border-color: var(--border-color);
}

.time-slot-card.disabled::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 12%;
    right: 12%;
    height: 3px;
    background: var(--text-tertiary);
    transform: translateY(-50%) rotate(-18deg);
    border-radius: 2px;
}

.btn-confirm-slot {
    width: 100%;
    padding: 1rem 1.5rem;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: 0.75rem;
    font-weight: 700;
    font-size: 1.0625rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-confirm-slot:active {
    transform: scale(0.98);
}

.btn-confirm-slot:hover:not(:disabled) {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
}

.btn-confirm-slot:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
    background: #94a3b8;
}

.btn-confirm-slot svg {
    flex-shrink: 0;
}

/* Tablet & Desktop */
@media (min-width: 600px) {
    .time-slots-grid {
        grid-template-columns: repeat(4, 1fr);
        /* 4 columnas en tablet+ */
    }

    .selected-date-display {
        font-size: 1.125rem;
    }
}

/* Dark Mode Time Slots */
[data-theme="dark"] .time-slots-wrapper {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .selected-date-display {
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .time-slot-card {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.15);
}

[data-theme="dark"] .time-slot-card:hover:not(.disabled) {
    background: rgba(99, 102, 241, 0.25);
    border-color: var(--color-primary);
}

[data-theme="dark"] .time-slot-card.selected {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

[data-theme="dark"] .time-slot-card.disabled {
    background: rgba(255, 255, 255, 0.02);
}


/* Flatpickr Custom Styles */
.flatpickr-calendar {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 1rem;
    box-shadow: var(--shadow-xl);
}

.flatpickr-months {
    background: var(--color-primary);
    border-radius: 1rem 1rem 0 0;
}

.flatpickr-current-month {
    color: white;
}

.flatpickr-weekdays {
    background: var(--bg-tertiary);
}

.flatpickr-weekday {
    color: var(--text-primary);
    font-weight: 600;
}

.flatpickr-day {
    color: var(--text-primary);
    border-radius: 0.5rem;
}

.flatpickr-day:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.flatpickr-day.selected {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: white;
}

.flatpickr-day.disabled {
    color: var(--text-tertiary);
    opacity: 0.3;
}

/* Phone Input Group */
.phone-input-group {
    display: flex;
    gap: 0.75rem;
}

.country-code-select {
    flex: 0 0 auto;
    min-width: 130px;
    max-width: 140px;
    padding: 0.875rem 0.75rem;
    border: 2px solid #e2e8f0;
    border-radius: 0.75rem;
    font-size: 0.9rem;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.country-code-select:hover {
    border-color: #cbd5e1;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
}

.country-code-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1), 0 2px 8px rgba(0, 0, 0, 0.08);
}

.phone-input-group input[type="tel"] {
    flex: 1;
    min-width: 0;
}

/* Responsive Phone Input */
@media (max-width: 480px) {
    .phone-input-group {
        gap: 0.5rem;
    }

    .country-code-select {
        min-width: 110px;
        max-width: 120px;
        padding: 0.875rem 0.5rem;
        font-size: 0.85rem;
    }
}

/* Form Validation Styles */
.field-error {
    display: block;
    color: #ef4444;
    font-size: 0.875rem;
    margin-top: 0.375rem;
    min-height: 1.25rem;
}

.field-hint {
    display: block;
    color: var(--text-tertiary);
    font-size: 0.8125rem;
    margin-top: 0.375rem;
}

.char-counter {
    text-align: right;
    font-family: var(--font-mono);
}

input.error,
textarea.error,
select.error {
    border-color: #ef4444;
    background-color: rgba(239, 68, 68, 0.05);
}

input.error:focus,
textarea.error:focus,
select.error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

input.success,
textarea.success,
select.success {
    border-color: #10b981;
}

input:invalid:not(:placeholder-shown) {
    border-color: #ef4444;
}

input:valid:not(:placeholder-shown) {
    border-color: #10b981;
}

/* Dark Mode Adjustments */
/* Dark Mode Country Select */
[data-theme="dark"] .country-code-select {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .country-code-select:hover {
    border-color: rgba(255, 255, 255, 0.25);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .country-code-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2), 0 2px 8px rgba(0, 0, 0, 0.4);
}


[data-theme="dark"] input.error,
[data-theme="dark"] textarea.error {
    background-color: rgba(239, 68, 68, 0.1);
}

/* ===================================
   8. FOOTER
   =================================== */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2rem;
}

.footer__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

.footer__brand {
    max-width: 300px;
}

.footer__brand img {
    height: 40px;
    width: auto;
    margin-bottom: 1rem;
}

.footer__tagline {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.footer__copyright {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    margin-top: 1rem;
}

.footer__copyright a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer__copyright a:hover {
    color: var(--color-primary-hover);
}

.footer__section h4.footer__heading {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
}

.footer__nav {
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
}

.footer__nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: all 0.3s ease;
    display: inline-block;
}

.footer__nav a:hover {
    color: var(--color-primary);
    transform: translateX(3px);
}

/* ===================================
   9. RESPONSIVE - TABLET
   =================================== */
@media (min-width: 768px) {
    .hero__title {
        font-size: 3.5rem;
    }

    .hero__subtitle {
        font-size: 1.375rem;
    }

    .comparison__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .services__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .calendar-container {
        grid-template-columns: 1fr 1fr;
        align-items: start;
    }

    .footer__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ===================================
   10. RESPONSIVE - DESKTOP
   =================================== */
@media (min-width: 1024px) {
    .nav__logo img {
        height: 50px;
    }

    .hero__title {
        font-size: 4rem;
    }

    .services__grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .calendar-container {
        grid-template-columns: 2fr 1fr;
    }

    .footer__grid {
        grid-template-columns: 1.2fr 1fr 1fr;
    }
}

/* ===================================
   11. ANIMATIONS & UTILITIES
   =================================== */
.fade-in {
    opacity: 0;
    animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

.slide-up {
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 0.6s ease forwards;
}

@keyframes slideUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Loading States */
.loading {
    pointer-events: none;
    opacity: 0.6;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-primary);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}