/* ========================================
   Header & Navigation
   ======================================== */

.header {
    background: var(--gradient);
    color: var(--color-white);
    padding: var(--spacing-2xl) 0;
}

.header__nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header__logo {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header__logo img {
    width: 40px;
    height: 40px;
}

.header__logo a {
    color: var(--color-white);
}

.header__nav-links a {
    color: var(--color-white);
    margin-left: var(--spacing-lg);
    opacity: 0.9;
    transition: opacity var(--transition-fast);
}

.header__nav-links a:hover {
    opacity: 1;
}

.header h1 {
    margin-top: var(--spacing-lg);
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-block;
    background: var(--color-white);
    color: var(--color-primary);
    padding: var(--spacing-md) var(--spacing-2xl);
    border-radius: 30px;
    font-weight: 600;
    font-size: var(--font-size-lg);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    cursor: pointer;
    border: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* ========================================
   Cards
   ======================================== */

.card {
    background: var(--color-bg-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.card__icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: var(--gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-7xl);
}

.card h3 {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-3xl);
}

.card p {
    line-height: var(--line-height);
}

/* Colored Card Variants */
.card--red .card__icon {
    background: var(--heart-red);
}

.card--pink .card__icon {
    background: var(--heart-pink);
}

.card--coral .card__icon {
    background: var(--heart-coral);
}

.card--purple .card__icon {
    background: var(--ecg-purple);
}

.card--green .card__icon {
    background: var(--accent-green);
}

.card--blue .card__icon {
    background: var(--accent-blue);
}

.card--yellow .card__icon {
    background: var(--accent-yellow);
}

/* ========================================
   Type Tags (Triggers/Medications)
   ======================================== */

.type-tag {
    background: rgba(255, 255, 255, 0.2);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 20px;
    font-weight: 500;
    backdrop-filter: blur(10px);
    color: var(--color-white);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.type-tag--red {
    background: rgba(232, 93, 76, 0.25);
    border: 1px solid rgba(232, 93, 76, 0.4);
    color: var(--heart-red);
}

.type-tag--blue {
    background: rgba(91, 155, 213, 0.25);
    border: 1px solid rgba(91, 155, 213, 0.4);
    color: var(--accent-blue);
}

.type-tag--green {
    background: rgba(107, 168, 96, 0.25);
    border: 1px solid rgba(107, 168, 96, 0.4);
    color: var(--accent-green);
}

.type-tag--yellow {
    background: rgba(245, 193, 86, 0.25);
    border: 1px solid rgba(245, 193, 86, 0.4);
    color: #c9a030;
}

.type-tag--purple {
    background: rgba(155, 122, 189, 0.25);
    border: 1px solid rgba(155, 122, 189, 0.4);
    color: var(--ecg-purple);
}

.type-tag--featured {
    background: rgba(255, 255, 255, 0.35);
    font-weight: 600;
}

/* ========================================
   Tabs
   ======================================== */

.tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-2xl);
    border-bottom: 1px solid #e0e0e0;
    padding-bottom: 0;
}

.tab-button {
    padding: var(--spacing-md) var(--spacing-2xl);
    background: none;
    border: none;
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    border-bottom: 3px solid transparent;
    margin-bottom: -1px;
}

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

.tab-button--active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.tab-panel {
    display: none;
}

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

/* ========================================
   Screenshot Carousel
   ======================================== */

.carousel {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
}

.carousel::-webkit-scrollbar {
    height: 8px;
}

.carousel::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: 4px;
}

.carousel::-webkit-scrollbar-track {
    background: #e0e0e0;
    border-radius: 4px;
}

.carousel__card {
    flex: 0 0 auto;
    scroll-snap-align: center;
    background: var(--color-white);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.carousel__card:hover {
    transform: scale(1.03);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.carousel__card img {
    width: 100%;
    aspect-ratio: 9 / 19.5;
    object-fit: cover;
    display: block;
}

.carousel__dots {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.carousel__dot {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-full);
    background: #ccc;
    cursor: pointer;
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.carousel__dot:hover {
    transform: scale(1.2);
}

.carousel__dot--active {
    background: var(--color-primary);
}

/* ========================================
   Steps (for Getting Started)
   ======================================== */

.step {
    display: flex;
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg);
    background: var(--color-bg-light);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
}

.step__number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: var(--gradient);
    color: var(--color-white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.step__content {
    flex: 1;
}

.step__content h4 {
    margin-top: 0;
    margin-bottom: var(--spacing-md);
}

/* ========================================
   Screenshot Row (for Getting Started)
   ======================================== */

.screenshot-row {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    margin: var(--spacing-xl) 0;
}

.screenshot-row img {
    flex: 1;
    min-width: 200px;
    max-width: 300px;
    width: 100%;
    border-radius: var(--radius-xl);
    aspect-ratio: auto;
}

/* ========================================
   Info Box (Tips)
   ======================================== */

.info-box {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: var(--spacing-md) var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    border-radius: var(--radius-sm);
}

.info-box__title {
    font-weight: 700;
    color: #856404;
    margin-bottom: var(--spacing-sm);
}

.info-box p {
    margin: 0;
    color: #856404;
}

/* ========================================
   Section Titles
   ======================================== */

.section-title {
    text-align: center;
    font-size: var(--font-size-6xl);
    margin-bottom: var(--spacing-2xl);
    color: var(--color-text);
}

.section-title--small {
    font-size: var(--font-size-4xl);
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 768px) {
    .step {
        flex-direction: column;
    }

    .screenshot-row {
        flex-direction: column;
    }

    .tabs {
        gap: 5px;
    }

    .tab-button {
        padding: 12px 16px;
        font-size: var(--font-size-sm);
    }
}