@import url('https://fonts.googleapis.com/css2?family=Fuzzy+Bubbles:wght@400;700&display=swap');

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

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

body {
    font-family: 'Fuzzy Bubbles', sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: #c9d1d9;
}

body.light-mode {
    background: linear-gradient(135deg, #f0f4f8 0%, #d9e2ec 100%);
    color: #2d3748;
}

body.light-mode #emoji-pattern {
    opacity: 0.08;
}

#board {
    width: 100vw;
    height: 100vh;
    position: relative;
    overflow: hidden;
    cursor: grab;
}

#board:active {
    cursor: grabbing;
}

#cards-container {
    position: absolute;
    width: 100%;
    height: 100%;
}

.quote-card {
    position: absolute;
    width: 450px;
    height: 380px;
    transform: rotate(var(--rotation, -2deg));
    transition: transform 0.3s ease;
    cursor: pointer;
    font-family: 'Fuzzy Bubbles', sans-serif;
    perspective: 1000px;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out forwards;
}

@keyframes fadeInUp {
    0% {
        opacity: 0;
        transform: translateY(30px) rotate(var(--rotation, -2deg));
    }
    100% {
        opacity: 1;
        transform: translateY(0) rotate(var(--rotation, -2deg));
    }
}

.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

.quote-card.flipped .card-inner {
    transform: rotateY(180deg);
}

.card-front, .card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    background: linear-gradient(135deg, #ffd89b 0%, #fffacd 100%);
    border-radius: 4px;
    padding: 25px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5),
                inset 0 1px 0 rgba(255, 255, 255, 0.3);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.card-front {
    justify-content: center;
    text-align: center;
}

.card-back {
    transform: rotateY(180deg);
    justify-content: center;
    align-items: center;
    text-align: center;
}

body.light-mode .card-front,
body.light-mode .card-back {
    background: linear-gradient(135deg, #fff5e1 0%, #fffef7 100%);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15),
                inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

@media (max-width: 768px) {
    .quote-card {
        width: 280px;
        height: 320px;
        margin-bottom: 20px;
    }

    .card-front, .card-back {
        padding: 20px;
    }

    .quote-text {
        font-size: 14px !important;
        line-height: 1.5 !important;
    }

    .quote-author {
        font-size: 11px !important;
    }

    .profile-avatar {
        width: 35px !important;
        height: 35px !important;
    }

    .profile-display-name {
        font-size: 11px !important;
    }

    .profile-stats {
        font-size: 9px !important;
    }

    .quote-date {
        font-size: 9px !important;
    }

    #topbar {
        top: 10px;
        left: 10px;
        right: 10px;
    }

    #search-container {
        height: 44px;
        padding: 0 12px;
    }

    #search-input {
        font-size: 12px;
        padding: 10px 0;
    }

    #search-icon {
        width: 14px;
        height: 14px;
    }

    #theme-toggle {
        height: 44px;
        width: 44px;
    }

    #theme-toggle svg {
        width: 18px;
        height: 18px;
    }

    #contribute-badge {
        height: 44px;
        padding: 0 12px;
    }

    #contribute-badge .badge-text {
        display: none;
    }

    #keyboard-hint {
        display: none;
    }
}

@media (max-width: 480px) {
    .quote-card {
        width: 240px;
        height: 280px;
        margin-bottom: 15px;
    }

    .card-front, .card-back {
        padding: 15px;
    }

    .quote-text {
        font-size: 13px !important;
        line-height: 1.4 !important;
    }

    .quote-author {
        font-size: 10px !important;
    }

    .profile-avatar {
        width: 30px !important;
        height: 30px !important;
    }

    .profile-display-name {
        font-size: 10px !important;
    }

    .profile-stats {
        font-size: 8px !important;
    }

    .quote-date {
        font-size: 8px !important;
    }

    #topbar {
        top: 10px;
        left: 10px;
        right: 10px;
    }

    #search-container {
        height: 40px;
        padding: 0 10px;
    }

    #search-input {
        font-size: 12px;
    }

    #topbar .actions {
        gap: 6px;
    }

    #theme-toggle {
        height: 40px;
        width: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    #theme-toggle svg {
        width: 16px;
        height: 16px;
        display: block;
    }

    #contribute-badge {
        height: 40px;
        width: 40px;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    #contribute-badge svg {
        height: 16px;
        width: 16px;
        display: block;
        margin: 0;
    }

    #contribute-badge .badge-text {
        display: none;
    }
}

@media (max-width: 375px) {
    #topbar {
        gap: 6px;
    }

    #search-container {
        height: 38px;
    }

    #topbar .actions {
        gap: 4px;
    }

    #theme-toggle {
        height: 38px;
        width: 38px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    #theme-toggle svg {
        width: 14px;
        height: 14px;
    }

    #contribute-badge {
        height: 38px;
        width: 38px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    #contribute-badge svg {
        height: 14px;
        width: 14px;
    }
}

.quote-card::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    background: radial-gradient(circle at 30% 30%, #ff6b6b, #c92a2a);
    border-radius: 50%;
    box-shadow: 0 3px 10px rgba(201, 42, 42, 0.5),
                inset -1px -1px 2px rgba(0, 0, 0, 0.2);
    z-index: 10;
}


.quote-card:hover {
    transform: rotate(0deg) translateY(-15px);
}

.quote-card:hover .card-front,
.quote-card:hover .card-back {
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6),
                inset 0 1px 0 rgba(255, 255, 255, 0.3),
                0 0 30px rgba(255, 215, 155, 0.6);
    animation: gentle-glow 2s ease-in-out infinite alternate;
}

@keyframes gentle-glow {
    0% { box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.3), 0 0 20px rgba(255, 215, 155, 0.4); }
    100% { box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.3), 0 0 40px rgba(255, 215, 155, 0.8); }
}

.confetti {
    position: fixed;
    width: 8px;
    height: 8px;
    pointer-events: none;
    z-index: 1;
    border-radius: 50%;
    animation: confetti-fall 3s linear forwards;
}

@keyframes burst-fall {
    0% {
        transform: translate(0, 0) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translate(var(--dx, 0), 100vh) rotate(360deg);
        opacity: 0;
    }
}

body.light-mode .quote-card:hover .card-front,
body.light-mode .quote-card:hover .card-back {
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.2),
                inset 0 1px 0 rgba(255, 255, 255, 0.5),
                0 0 30px rgba(255, 193, 7, 0.4);
}

body.light-mode .quote-card:hover .card-front,
body.light-mode .quote-card:hover .card-back {
    animation: gentle-glow-light 2s ease-in-out infinite alternate;
}

@keyframes gentle-glow-light {
    0% { box-shadow: 0 25px 60px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.5), 0 0 20px rgba(255, 193, 7, 0.3); }
    100% { box-shadow: 0 25px 60px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.5), 0 0 40px rgba(255, 193, 7, 0.6); }
}

.quote-card:nth-child(1) { --rotation: -3deg; }
.quote-card:nth-child(2) { --rotation: 2deg; }
.quote-card:nth-child(3) { --rotation: -1.5deg; }
.quote-card:nth-child(4) { --rotation: 1.8deg; }
.quote-card:nth-child(5) { --rotation: -2.5deg; }
.quote-card:nth-child(6) { --rotation: 0.5deg; }
.quote-card:nth-child(7) { --rotation: -1.2deg; }
.quote-card:nth-child(8) { --rotation: 2.3deg; }
.quote-card:nth-child(9) { --rotation: -0.8deg; }
.quote-card:nth-child(10) { --rotation: 1.5deg; }

.quote-text {
    font-size: 18px;
    font-weight: 500;
    line-height: 1.7;
    color: #2d2d2d;
    margin-bottom: 15px;
    word-wrap: break-word;
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.quote-author {
    color: #666;
    font-size: 12px;
    margin-bottom: 15px;
    font-weight: 600;
}

.card-front .profile {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding-top: 12px;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    margin-top: auto;
}

.card-back .profile {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    text-align: center;
}

.flip-hint {
    color: #999;
    font-size: 10px;
    text-align: center;
    margin-top: 10px;
    opacity: 0;
    transition: opacity 0.2s;
}

.quote-card:hover .flip-hint {
    opacity: 1;
}

.card-back .profile-avatar {
    width: 80px;
    height: 80px;
}

.card-back .quote-date {
    font-size: 12px;
    color: #666;
    font-weight: 400;
    font-style: italic;
    text-align: center;
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    width: 100%;
}

.quote-date {
    color: #999;
    font-size: 10px;
    font-weight: 400;
    font-style: italic;
    margin-left: auto;
    align-self: center;
}

.profile-avatar-link {
    text-decoration: none;
    display: flex;
}

.profile-avatar-link:hover img {
    opacity: 0.8;
    transition: opacity 0.2s;
}

.profile-avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    border: 2px solid #e8b74a;
    object-fit: cover;
    background: #ddd;
    flex-shrink: 0;
}

.profile-avatar.placeholder {
    background: #e0e0e0;
    opacity: 0.7;
}

.profile-info {
    flex: 1;
    min-width: 0;
}

.profile-name-link {
    text-decoration: none;
    color: inherit;
}

.profile-name {
    font-weight: 700;
    color: #2d2d2d;
    font-size: 12px;
}

.profile-display-name {
    font-weight: 700;
    margin-bottom: 4px;
    color: #2d2d2d;
    transition: color 0.2s ease;
}

.profile-stats {
    font-size: 10px;
    color: #666;
    font-weight: 400;
}

.profile-name-link:hover .profile-display-name {
    color: #58a6ff;
}

#topbar {
    position: fixed;
    top: 20px;
    left: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 10px;
}

#topbar .actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    margin-left: auto;
}

#search-container {
    flex: 1 1 auto;
    min-width: 0;
    max-width: 500px;
    display: flex;
    align-items: center;
    background: rgba(22, 27, 34, 0.95);
    border-radius: 8px;
    border: 1px solid rgba(88, 166, 255, 0.3);
    backdrop-filter: blur(10px);
    padding: 0 15px;
    height: 48px;
}

body.light-mode #search-container {
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(66, 153, 225, 0.4);
}

.search-box {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    min-width: 0;
}

#search-input {
    flex: 1 1 auto;
    min-width: 0;
    background: transparent;
    border: none;
    outline: none;
    color: #c9d1d9;
    font-family: 'Fuzzy Bubbles', sans-serif;
    font-size: 14px;
    padding: 12px 0;
}

body.light-mode #search-input {
    color: #2d3748;
}

#search-input::placeholder {
    color: #8b949e;
}

body.light-mode #search-input::placeholder {
    color: #718096;
}

#search-icon {
    fill: #58a6ff;
    flex-shrink: 0;
}

body.light-mode #search-icon {
    fill: #4299e1;
}

#theme-toggle {
    height: 48px;
    width: 48px;
    padding: 0;
    background: rgba(22, 27, 34, 0.95);
    border: 1px solid rgba(88, 166, 255, 0.3);
    border-radius: 8px;
    cursor: pointer;
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

body.light-mode #theme-toggle {
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(66, 153, 225, 0.4);
}

#theme-toggle:hover {
    transform: translateY(-2px);
    border-color: rgba(88, 166, 255, 0.6);
}

body.light-mode #theme-toggle:hover {
    border-color: rgba(66, 153, 225, 0.6);
}

#theme-toggle svg {
    width: 20px;
    height: 20px;
}

#theme-toggle .sun-icon {
    fill: #58a6ff;
    display: none;
}

#theme-toggle .moon-icon {
    fill: #58a6ff;
    display: block;
}

body.light-mode #theme-toggle .sun-icon {
    fill: #f59e0b;
    display: block;
}

body.light-mode #theme-toggle .moon-icon {
    display: none;
}

#contribute-badge {
    height: 48px;
    padding: 0 20px;
    background: rgba(22, 27, 34, 0.95);
    border-radius: 8px;
    border: 1px solid rgba(88, 166, 255, 0.3);
    backdrop-filter: blur(10px);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    color: #58a6ff;
    font-weight: 600;
    font-size: 14px;
    flex-shrink: 0;
}

body.light-mode #contribute-badge {
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(66, 153, 225, 0.4);
    color: #4299e1;
}

#contribute-badge:hover {
    transform: translateY(-2px);
    border-color: rgba(88, 166, 255, 0.6);
}

body.light-mode #contribute-badge:hover {
    border-color: rgba(66, 153, 225, 0.6);
}

#contribute-badge svg {
    fill: #58a6ff;
    flex-shrink: 0;
}

body.light-mode #contribute-badge svg {
    fill: #4299e1;
}

@media (max-width: 768px) {
    #topbar {
        top: 10px;
        left: 10px;
        right: 10px;
    }

    #search-container {
        height: 44px;
        padding: 0 12px;
    }

    #search-input {
        font-size: 12px;
        padding: 10px 0;
    }

    #search-icon {
        width: 14px;
        height: 14px;
    }

    #theme-toggle {
        height: 44px;
        width: 44px;
    }

    #theme-toggle svg {
        width: 18px;
        height: 18px;
    }

    #contribute-badge {
        height: 44px;
        padding: 0 12px;
    }

    #contribute-badge .badge-text {
        display: none;
    }

    #keyboard-hint {
        display: none;
    }
}

@media (max-width: 480px) {
    #search-container {
        height: 40px;
        padding: 0 10px;
    }

    #search-input {
        font-size: 12px;
    }

    #topbar .actions {
        gap: 6px;
    }

    #theme-toggle {
        height: 40px;
        width: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    #theme-toggle svg {
        width: 16px;
        height: 16px;
        display: block;
    }

    #contribute-badge {
        height: 40px;
        width: 40px;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    #contribute-badge svg {
        height: 16px;
        width: 16px;
        display: block;
        margin: 0;
    }

    #contribute-badge .badge-text {
        display: none;
    }
}

@media (max-width: 375px) {
    #topbar {
        gap: 6px;
    }

    #search-container {
        height: 38px;
    }

    #topbar .actions {
        gap: 4px;
    }

    #theme-toggle {
        height: 38px;
        width: 38px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    #theme-toggle svg {
        width: 14px;
        height: 14px;
    }

    #contribute-badge {
        height: 38px;
        width: 38px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    #contribute-badge svg {
        height: 14px;
        width: 14px;
    }
}

#loading {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.2rem;
    color: #8b949e;
    background: rgba(22, 27, 34, 0.95);
    padding: 20px 40px;
    border-radius: 8px;
    z-index: 100;
}

body.light-mode #loading {
    background: rgba(255, 255, 255, 0.95);
    color: #4a5568;
}

#loading.hide {
    display: none;
}

.copy-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.1);
    border: none;
    border-radius: 4px;
    padding: 6px 10px;
    cursor: pointer;
    font-size: 16px;
    opacity: 0;
    transition: opacity 0.2s;
}

.quote-card:hover .copy-btn {
    opacity: 1;
}

.copy-btn:hover {
    background: rgba(0, 0, 0, 0.2);
}

#keyboard-hint {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(22, 27, 34, 0.95);
    border: 1px solid rgba(88, 166, 255, 0.3);
    border-radius: 6px;
    padding: 8px 16px;
    color: #8b949e;
    font-size: 11px;
    backdrop-filter: blur(10px);
    z-index: 1000;
}

body.light-mode #keyboard-hint {
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(66, 153, 225, 0.4);
    color: #718096;
}

#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}