* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --pink: #ff5d8f;
    --soft-pink: #ffb3c6;
    --cream: #fff0f3;
    --deep: #c9184a;
}

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #ffe5ec 0%, #ffc2d1 50%, #ffb3c6 100%);
    min-height: 100vh;
    overflow-x: hidden;
    color: #6a1b3a;
    position: relative;
}

/* ---------- Screens ---------- */
.screen {
    min-height: 100vh;
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 40px 20px;
    position: relative;
    z-index: 2;
    animation: fadeIn 1s ease;
}

.screen.active { display: flex; }

.screen.dark {
    background: radial-gradient(circle at 50% 30%, #3a0d1f 0%, #1a0510 70%, #0d0208 100%);
    color: #fff;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}

.hidden { display: none !important; }

/* ---------- Intro ---------- */
.cake-emoji {
    font-size: 90px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-20px); }
}

.intro-title {
    font-family: 'Dancing Script', cursive;
    font-size: 3.5rem;
    color: var(--deep);
    margin: 10px 0;
}

.intro-sub {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: var(--pink);
}

/* ---------- Buttons ---------- */
.btn-open {
    background: var(--pink);
    color: #fff;
    border: none;
    padding: 15px 40px;
    font-size: 1.1rem;
    font-family: 'Poppins', sans-serif;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: 0 8px 20px rgba(255, 93, 143, 0.4);
    transition: transform 0.2s, box-shadow 0.2s;
    margin-top: 25px;
}

.btn-open:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 12px 28px rgba(255, 93, 143, 0.55);
}

.btn-open:active { transform: scale(0.97); }

/* Yes / No question */
.qna-btns {
    display: flex;
    gap: 20px;
    justify-content: center;
    align-items: center;
    margin-top: 30px;
    flex-wrap: wrap;
}

.btn-no {
    background: #fff;
    color: var(--deep);
    border: 2px solid var(--pink);
    padding: 15px 40px;
    font-size: 1.1rem;
    font-family: 'Poppins', sans-serif;
    border-radius: 50px;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}

.btn-no:hover { background: var(--soft-pink); color: #fff; }

/* ============ PASSWORD SCREEN ============ */
.lock-wrap {
    display: flex;
    gap: 40px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    max-width: 900px;
}

.lock-photo {
    position: relative;
    width: 300px;
    height: 320px;
    border-radius: 18px;
    overflow: hidden;
    box-shadow: 0 0 40px rgba(255, 93, 143, 0.4);
    border: 2px solid rgba(255, 93, 143, 0.3);
}

.lock-photo img { width: 100%; height: 100%; object-fit: cover; object-position: center top; }

.lock-photo-cap {
    position: absolute;
    bottom: 14px;
    left: 0; right: 0;
    color: #fff;
    font-style: italic;
    font-size: 0.95rem;
    text-shadow: 0 2px 6px rgba(0,0,0,0.7);
}

.lock-card {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 93, 143, 0.3);
    backdrop-filter: blur(12px);
    border-radius: 24px;
    padding: 40px 35px;
    width: 340px;
    box-shadow: 0 0 50px rgba(255, 93, 143, 0.2);
}

.lock-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 18px;
    background: linear-gradient(135deg, #ff5d8f, #c9184a);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 0 25px rgba(255, 93, 143, 0.6);
    animation: pulse 2s infinite;
}

.lock-title {
    font-size: 1.6rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 8px;
}

.lock-heart { font-size: 18px; margin-bottom: 6px; }

.lock-sub {
    font-size: 0.9rem;
    color: #ffb3c6;
    margin-bottom: 22px;
}

.code-input {
    position: relative;
    margin-bottom: 14px;
}

.code-input input {
    width: 100%;
    padding: 16px 44px 16px 18px;
    background: rgba(0,0,0,0.3);
    border: 1px solid rgba(255, 93, 143, 0.5);
    border-radius: 12px;
    color: #fff;
    font-size: 1.1rem;
    letter-spacing: 4px;
    outline: none;
    transition: border 0.2s, box-shadow 0.2s;
}

.code-input input:focus {
    border-color: var(--pink);
    box-shadow: 0 0 18px rgba(255, 93, 143, 0.5);
}

.eye-btn {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 18px;
    opacity: 0.8;
}

.code-dots {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 16px;
}

.code-dots .dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    transition: background 0.2s, transform 0.2s;
}

.code-dots .dot.filled {
    background: var(--pink);
    transform: scale(1.2);
    box-shadow: 0 0 10px var(--pink);
}

.lock-error {
    color: #ff8fab;
    font-size: 0.85rem;
    min-height: 1.1rem;
    margin-bottom: 8px;
}

.btn-unlock {
    width: 100%;
    padding: 16px;
    border: none;
    border-radius: 12px;
    background: linear-gradient(135deg, #ff5d8f, #c9184a);
    color: #fff;
    font-size: 1.05rem;
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    box-shadow: 0 8px 22px rgba(201, 24, 74, 0.5);
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-unlock:hover { transform: translateY(-3px); box-shadow: 0 12px 28px rgba(201,24,74,0.65); }

.lock-hint {
    margin-top: 14px;
    font-size: 0.8rem;
    color: #ffb3c6;
    opacity: 0.8;
}

.shake { animation: shake 0.4s; }
@keyframes shake {
    0%,100% { transform: translateX(0); }
    25% { transform: translateX(-9px); }
    75% { transform: translateX(9px); }
}

/* ---------- Big wish ---------- */
.big-wish {
    font-family: 'Dancing Script', cursive;
    font-size: 4rem;
    color: var(--deep);
    line-height: 1.1;
    margin-bottom: 30px;
    text-shadow: 2px 2px 0 #fff;
}

.big-wish span { color: var(--pink); font-size: 4.5rem; }
.big-wish.small { font-size: 2.8rem; margin-bottom: 6px; }

/* ---------- Gallery ---------- */
.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
    max-width: 760px;
    width: 100%;
    margin: 25px 0;
}

.gallery-item {
    position: relative;
    aspect-ratio: 1 / 1;
    border-radius: 18px;
    overflow: hidden;
    border: 5px solid #fff;
    box-shadow: 0 8px 22px rgba(201, 24, 74, 0.22);
    cursor: pointer;
}

.gallery-item img,
.gallery-item video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.gallery-item:hover img,
.gallery-item:hover video { transform: scale(1.12); }

.gallery-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(201,24,74,0.85) 0%, rgba(201,24,74,0.1) 60%, transparent 100%);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 14px;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.35s, transform 0.35s;
}

.gallery-item:hover .gallery-overlay,
.gallery-item.show .gallery-overlay { opacity: 1; transform: translateY(0); }

.gallery-overlay span {
    color: #fff;
    font-family: 'Dancing Script', cursive;
    font-size: 1.4rem;
    text-align: center;
    line-height: 1.2;
    text-shadow: 0 2px 6px rgba(0,0,0,0.3);
}

.gallery-item .play-badge {
    position: absolute;
    top: 10px; right: 10px;
    background: rgba(255,255,255,0.85);
    border-radius: 50%;
    width: 30px; height: 30px;
    display: flex; align-items: center; justify-content: center;
    font-size: 14px;
}

/* ---------- Cake ---------- */
.cake-stage {
    margin: 30px 0;
    display: flex;
    justify-content: center;
}

.cake {
    position: relative;
    width: 220px;
    height: 150px;
}

.cake-bottom {
    position: absolute;
    bottom: 0;
    width: 220px;
    height: 90px;
    background: linear-gradient(#ff8fab, #ff5d8f);
    border-radius: 14px 14px 8px 8px;
}

.cake-top {
    position: absolute;
    bottom: 75px;
    left: 15px;
    width: 190px;
    height: 50px;
    background: linear-gradient(#fff0f3, #ffd6e0);
    border-radius: 14px 14px 0 0;
    box-shadow: 0 6px 0 #ffe0ea;
}

.candle {
    position: absolute;
    bottom: 120px;
    width: 10px;
    height: 34px;
    background: repeating-linear-gradient(45deg, #ffd700, #ffd700 5px, #ffaa00 5px, #ffaa00 10px);
    border-radius: 3px;
    transform: translateX(-50%);
}

.flame {
    position: absolute;
    top: -22px;
    left: 50%;
    transform: translateX(-50%);
    width: 14px;
    height: 22px;
    background: radial-gradient(circle at 50% 70%, #fff 0%, #ffd700 35%, #ff7b00 75%);
    border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
    cursor: pointer;
    animation: flicker 0.6s infinite alternate;
    box-shadow: 0 0 18px 4px rgba(255, 170, 0, 0.7);
}

@keyframes flicker {
    from { transform: translateX(-50%) scale(1) rotate(-2deg); opacity: 1; }
    to   { transform: translateX(-50%) scale(1.1) rotate(2deg); opacity: 0.85; }
}

.flame.out {
    animation: none;
    opacity: 0;
    box-shadow: none;
    transition: opacity 0.4s;
}

/* ---------- Balloons rising ---------- */
.balloon-layer {
    position: fixed;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
    z-index: 5;
}

.rise-balloon {
    position: absolute;
    bottom: -120px;
    width: 46px;
    height: 58px;
    border-radius: 50% 50% 50% 50% / 45% 45% 55% 55%;
    animation: riseUp linear forwards;
}

.rise-balloon::after {
    content: '';
    position: absolute;
    bottom: -40px;
    left: 50%;
    width: 1px;
    height: 40px;
    background: rgba(255,255,255,0.6);
}

@keyframes riseUp {
    to { transform: translateY(-115vh) rotate(8deg); }
}

/* ---------- Photo frame ---------- */
.photo-frame {
    position: relative;
    width: 260px;
    height: 260px;
    margin: 20px 0 30px;
}

.photo-frame img {
    width: 100%; height: 100%;
    object-fit: cover;
    object-position: center top;
    border-radius: 50%;
    border: 8px solid #fff;
    box-shadow: 0 10px 30px rgba(201, 24, 74, 0.3);
    position: relative;
    z-index: 2;
}

.photo-glow {
    position: absolute;
    inset: -15px;
    border-radius: 50%;
    background: conic-gradient(var(--pink), var(--soft-pink), #fff, var(--pink));
    animation: spin 6s linear infinite;
    z-index: 1;
}

@keyframes spin { to { transform: rotate(360deg); } }

.balloon-static {
    position: absolute;
    font-size: 50px;
    z-index: 3;
    animation: float 4s ease-in-out infinite;
}

.balloon-1 { top: -30px; left: -40px; }
.balloon-2 { bottom: -20px; right: -40px; animation-delay: 1.5s; }

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(-5deg); }
    50%      { transform: translateY(-18px) rotate(5deg); }
}

/* ---------- Wishes ---------- */
.wishes { max-width: 600px; margin-bottom: 10px; }

.wishes p {
    font-size: 1.15rem;
    margin: 12px 0;
    opacity: 0;
    transform: translateY(15px);
    animation: riseIn 0.6s forwards;
}

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

/* ---------- Gift boxes ---------- */
.gift-row {
    display: flex;
    gap: 28px;
    flex-wrap: wrap;
    justify-content: center;
    margin: 30px 0;
}

.gift-box {
    font-size: 90px;
    cursor: pointer;
    background: none;
    border: none;
    transition: transform 0.25s ease;
    animation: float 3.5s ease-in-out infinite;
    position: relative;
}

.gift-box:nth-child(2) { animation-delay: 0.6s; }
.gift-box:nth-child(3) { animation-delay: 1.2s; }
.gift-box:hover { transform: translateY(-8px) scale(1.12) rotate(-4deg); }
.gift-box.opened { opacity: 0.55; animation: none; }

.gift-box .gift-label {
    display: block;
    font-size: 0.9rem;
    font-family: 'Poppins', sans-serif;
    color: var(--deep);
    margin-top: 6px;
    font-weight: 600;
}

/* ---------- Modal ---------- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(106, 27, 58, 0.55);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 50;
    padding: 20px;
}

.modal-overlay.open { display: flex; animation: fadeIn 0.3s ease; }

.modal-box {
    background: #fff;
    border-radius: 24px;
    max-width: 460px;
    width: 100%;
    padding: 40px 30px;
    text-align: center;
    position: relative;
    box-shadow: 0 20px 50px rgba(0,0,0,0.3);
    animation: popIn 0.4s ease;
}

@keyframes popIn {
    from { transform: scale(0.7); opacity: 0; }
    to   { transform: scale(1); opacity: 1; }
}

.modal-close {
    position: absolute;
    top: 14px; right: 16px;
    background: none; border: none;
    font-size: 22px; color: var(--pink);
    cursor: pointer;
}

.modal-content h3 {
    font-family: 'Dancing Script', cursive;
    font-size: 2.2rem;
    color: var(--deep);
    margin-bottom: 14px;
}

.modal-content p { font-size: 1.15rem; line-height: 1.7; white-space: pre-line; }
.modal-content img, .modal-content video { width: 100%; border-radius: 14px; margin-top: 12px; }
.modal-content .big-emoji { font-size: 60px; display: block; margin-bottom: 10px; }

/* ---------- Memory Lightbox (related photos) ---------- */
.mem-lightbox {
    position: fixed;
    inset: 0;
    background: rgba(26, 5, 16, 0.85);
    backdrop-filter: blur(10px);
    display: none;
    align-items: center;
    justify-content: center;
    gap: 10px;
    z-index: 70;
    padding: 20px;
}

.mem-lightbox.open { display: flex; animation: fadeIn 0.3s ease; }

.mem-stage {
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 640px;
    width: 100%;
}

.mem-title {
    font-family: 'Dancing Script', cursive;
    font-size: 2rem;
    color: #fff;
    margin-bottom: 16px;
    text-shadow: 0 2px 12px rgba(255, 93, 143, 0.6);
}

.mem-frame {
    position: relative;
    padding: 10px;
    border-radius: 22px;
    background: linear-gradient(135deg, rgba(255,93,143,0.5), rgba(255,255,255,0.15));
    box-shadow: 0 0 60px rgba(255, 93, 143, 0.45);
}

.mem-frame img {
    display: block;
    max-width: 100%;
    max-height: 62vh;
    border-radius: 16px;
    border: 4px solid #fff;
    object-fit: cover;
}

.mem-frame video {
    display: block;
    max-width: 100%;
    max-height: 62vh;
    border-radius: 16px;
    border: 4px solid #fff;
    background: #000;
}

.mem-missing {
    padding: 40px 30px;
    color: #fff;
    font-weight: 600;
    text-align: center;
    line-height: 1.5;
}

.mem-frame img.fade-in { animation: memFade 0.45s ease; }
@keyframes memFade {
    from { opacity: 0; transform: scale(0.96); }
    to   { opacity: 1; transform: scale(1); }
}

.mem-note {
    margin-top: 16px;
    font-family: 'Dancing Script', cursive;
    font-size: 1.6rem;
    color: #ffd6e0;
    text-align: center;
    min-height: 2rem;
    text-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

.mem-dots {
    display: flex;
    gap: 10px;
    margin-top: 16px;
}

.mem-dot {
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}

.mem-dot.active {
    background: var(--pink);
    transform: scale(1.3);
    box-shadow: 0 0 12px var(--pink);
}

.mem-nav {
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,93,143,0.5);
    color: #fff;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    font-size: 30px;
    line-height: 1;
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.2s, transform 0.2s;
}

.mem-nav:hover { background: var(--pink); transform: scale(1.1); }

.mem-close {
    position: absolute;
    top: 22px;
    right: 26px;
    background: none;
    border: none;
    color: #fff;
    font-size: 30px;
    cursor: pointer;
    opacity: 0.85;
    transition: transform 0.2s;
}

.mem-close:hover { transform: scale(1.2) rotate(90deg); }

@media (max-width: 600px) {
    .mem-nav { width: 42px; height: 42px; font-size: 24px; }
    .mem-title { font-size: 1.6rem; }
    .mem-note { font-size: 1.3rem; }
    .mem-frame img { max-height: 52vh; }
}

/* ---------- Letter / Quiz ---------- */
.letter {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(6px);
    max-width: 560px;
    width: 100%;
    padding: 40px;
    border-radius: 25px;
    box-shadow: 0 15px 40px rgba(201, 24, 74, 0.25);
}

.letter h2 {
    font-family: 'Dancing Script', cursive;
    font-size: 2.5rem;
    color: var(--deep);
    margin-bottom: 14px;
}

/* Quiz card */
.quiz-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(6px);
    max-width: 520px;
    width: 100%;
    padding: 36px 34px;
    border-radius: 26px;
    box-shadow: 0 15px 40px rgba(201, 24, 74, 0.25);
}

.quiz-heading {
    font-family: 'Dancing Script', cursive;
    font-size: 2.3rem;
    color: var(--deep);
    margin-bottom: 16px;
}

.quiz-progress {
    width: 100%;
    height: 9px;
    background: #ffe0ea;
    border-radius: 20px;
    overflow: hidden;
    margin-bottom: 10px;
}

.quiz-progress-bar {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--soft-pink), var(--pink));
    border-radius: 20px;
    transition: width 0.4s ease;
}

.quiz-count {
    font-size: 0.9rem;
    color: var(--pink);
    font-weight: 600;
    margin-bottom: 20px;
}

.quiz-body { min-height: 150px; }

.quiz-body.q-anim { animation: quizIn 0.4s ease; }
@keyframes quizIn {
    from { opacity: 0; transform: translateX(25px); }
    to   { opacity: 1; transform: translateX(0); }
}

.quiz-question {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--deep);
    line-height: 1.4;
    margin-bottom: 18px;
}

.quiz-input {
    width: 100%;
    padding: 14px 16px;
    border: 1.5px solid var(--soft-pink);
    border-radius: 14px;
    font-family: 'Poppins', sans-serif;
    font-size: 1.05rem;
    color: #6a1b3a;
    outline: none;
    resize: vertical;
    background: #fff;
    transition: border 0.2s, box-shadow 0.2s;
}

.quiz-input:focus {
    border-color: var(--pink);
    box-shadow: 0 0 14px rgba(255, 93, 143, 0.3);
}

.quiz-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 14px;
    margin-top: 24px;
}

.quiz-nav .btn-open,
.quiz-nav .btn-ghost { margin-top: 0; }

.btn-ghost {
    background: transparent;
    color: var(--deep);
    border: 2px solid var(--pink);
    padding: 12px 26px;
    font-size: 1rem;
    font-family: 'Poppins', sans-serif;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-ghost:hover { background: var(--pink); color: #fff; }

.q-form { display: flex; flex-direction: column; gap: 14px; text-align: left; margin-top: 10px; }

.q-form input,
.q-form textarea {
    width: 100%;
    padding: 13px 16px;
    border: 1.5px solid var(--soft-pink);
    border-radius: 12px;
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    color: #6a1b3a;
    outline: none;
    resize: vertical;
}

.q-form input:focus, .q-form textarea:focus { border-color: var(--pink); }

.q-field label {
    display: block;
    font-weight: 600;
    color: var(--deep);
    margin-bottom: 6px;
    font-size: 0.98rem;
}

.q-status { margin-top: 16px; font-weight: 600; color: var(--deep); min-height: 1.2rem; }

.signature {
    margin-top: 20px;
    font-family: 'Dancing Script', cursive;
    font-size: 1.6rem;
    color: var(--pink);
}

/* ---------- Final video ---------- */
.final-video-wrap {
    width: 100%;
    max-width: 640px;
    margin: 20px 0;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 15px 45px rgba(201, 24, 74, 0.3);
    background: #000;
}

.final-video-wrap video { width: 100%; display: block; }

.final-btns {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    justify-content: center;
}

/* ---------- Floating hearts ---------- */
.hearts-container {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
}

.heart {
    position: absolute;
    bottom: -50px;
    font-size: 20px;
    animation: rise linear forwards;
    opacity: 0.8;
}

@keyframes rise {
    to { transform: translateY(-110vh) rotate(360deg); opacity: 0; }
}

/* ---------- Music button ---------- */
.music-btn {
    position: fixed;
    top: 20px; right: 20px;
    z-index: 60;
    background: #fff;
    border: none;
    width: 50px; height: 50px;
    border-radius: 50%;
    font-size: 22px;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    transition: transform 0.2s;
}

.music-btn:hover { transform: scale(1.1); }
.music-btn.playing { animation: pulse 1.5s infinite; }

@keyframes pulse {
    0%, 100% { box-shadow: 0 4px 12px rgba(255,93,143,0.4); }
    50%      { box-shadow: 0 4px 22px rgba(255,93,143,0.85); }
}

/* ---------- Confetti ---------- */
.confetti-layer {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.confetti {
    position: absolute;
    width: 10px; height: 10px;
    top: -20px;
    animation: confettiFall linear forwards;
}

@keyframes confettiFall { to { transform: translateY(105vh) rotate(720deg); } }

/* ---------- Responsive ---------- */
@media (max-width: 500px) {
    .intro-title { font-size: 2.5rem; }
    .big-wish { font-size: 2.8rem; }
    .big-wish span { font-size: 3.2rem; }
    .big-wish.small { font-size: 2.2rem; }
    .photo-frame { width: 200px; height: 200px; }
    .letter { padding: 25px; }
    .lock-photo { width: 240px; height: 260px; }
    .lock-card { width: 100%; max-width: 340px; }
}