/* ==========================================================================
   Responsive — Desktop, Tablet, Phone
   ========================================================================== */

/* Large Desktop */
@media (min-width: 1400px) {
    .hero-title {
        font-size: 7.5rem;
    }
}

/* Tablet */
@media (max-width: 1024px) {
    .info-grid {
        grid-template-columns: 1fr;
        max-width: 420px;
        margin-inline: auto;
    }

    .gallery-masonry {
        columns: 2;
    }

    .couple-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .couple-heart {
        order: -1;
        margin: 0 auto;
    }

    .timeline {
        padding-left: 32px;
    }

    .timeline-dot {
        left: -32px;
    }
}

/* Mobile Navigation */
@media (max-width: 900px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(247, 240, 232, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        padding: 24px;
        gap: 0;
        box-shadow: var(--shadow-medium);
        transform: translateY(-120%);
        opacity: 0;
        visibility: hidden;
        transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
    }

    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-links li {
        width: 100%;
        border-bottom: 1px solid rgba(126, 30, 43, 0.08);
    }

    .nav-links a {
        display: block;
        padding: 14px 8px;
        font-size: 0.95rem;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --section-padding: clamp(64px, 14vw, 100px);
        --nav-height: 64px;
    }

    .parents-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin-inline: auto;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .gift-qr-grid {
        grid-template-columns: 1fr;
        max-width: 280px;
        margin-inline: auto;
    }

    .countdown-sep {
        display: none;
    }

    .countdown {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .countdown-item {
        min-width: unset;
    }

    .gallery-masonry {
        columns: 2;
        column-gap: 10px;
    }

    .gallery-item {
        margin-bottom: 10px;
    }

    .lightbox-nav {
        width: 44px;
        height: 44px;
    }

    .lightbox-prev { left: 8px; }
    .lightbox-next { right: 8px; }

    .lightbox-close {
        top: 12px;
        right: 16px;
    }

    .music-btn {
        bottom: 20px;
        right: 20px;
        width: 48px;
        height: 48px;
    }

    .hero-content {
        padding: 32px 20px;
    }

    .btn {
        padding: 14px 28px;
        font-size: 0.9rem;
    }

    .parent-card__body {
        padding: 24px;
    }

    .timeline-content:hover {
        transform: none;
    }
}

/* Small Phone */
@media (max-width: 480px) {
    .gallery-masonry {
        columns: 1;
    }

    .hero-eyebrow {
        letter-spacing: 0.2em;
    }

    .hero-date {
        letter-spacing: 0.12em;
    }

    .envelope {
        width: 260px;
        height: 180px;
    }

    .gift-modal__content {
        padding: 28px 20px;
    }

    .gift-qr-card__frame {
        width: 140px;
        height: 140px;
    }

    .couple-card {
        padding: 28px 20px;
    }

    .section-title {
        font-size: 2.25rem;
    }
}

/* Landscape phone */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding: 80px 0 60px;
    }

    .hero-scroll {
        display: none;
    }

    .envelope-overlay {
        overflow-y: auto;
        padding: 20px;
    }
}

/* Touch devices — larger tap targets */
@media (hover: none) and (pointer: coarse) {
    .gallery-item__overlay {
        opacity: 1;
        background: linear-gradient(180deg, transparent 70%, rgba(126, 30, 43, 0.4) 100%);
    }

    .nav-links a {
        min-height: 48px;
        display: flex;
        align-items: center;
    }

    .lightbox-nav,
    .lightbox-close,
    .music-btn {
        min-width: 48px;
        min-height: 48px;
    }
}

/* High DPI screens */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .couple-avatar {
        image-rendering: -webkit-optimize-contrast;
    }
}