@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,700&family=Work+Sans:wght@400;500;600;700&display=swap');

:root {
    --spotify-black: #13171f;
    --spotify-dark: #1b202b;
    --spotify-light: #272f3d;
    --spotify-green: #1db954;
    --spotify-hover: #2ed760;
    --text-primary: #e9f7ee;
    --text-sec: #a9c6b3;
    --ink-strong: #f4fff8;
    --ink-soft: #b8d6c2;
    --surface-1: rgba(26, 30, 40, 0.78);
    --surface-2: rgba(21, 25, 34, 0.72);
    --border-soft: rgba(73, 191, 111, 0.28);
    --accent-rose: #159947;
}

html,
body {
    height: 100%;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Work Sans', 'Segoe UI', sans-serif;
    margin: 0;
    color: var(--text-primary);
    background:
        radial-gradient(1200px 650px at 86% -10%, rgba(46, 215, 96, 0.2), transparent 65%),
        radial-gradient(950px 500px at -10% 8%, rgba(29, 185, 84, 0.16), transparent 62%),
        linear-gradient(165deg, #11151d 0%, #161a24 44%, #0f131b 100%);
    position: relative;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image: radial-gradient(rgba(219, 255, 233, 0.05) 1px, transparent 0);
    background-size: 3px 3px;
    opacity: 0.18;
    z-index: 0;
}

h1,
h2,
p,
label {
    margin: 0;
}

#app {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1;
}

#top-header {
    background: linear-gradient(140deg, rgba(22, 27, 37, 0.86), rgba(21, 25, 35, 0.74));
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border-soft);
    padding: 0 clamp(14px, 3vw, 34px);
    position: sticky;
    top: 0;
    z-index: 40;
}

.header-content {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 22px;
    max-width: 1400px;
    padding: clamp(11px, 1.7vw, 18px) 0 clamp(9px, 1.2vw, 12px);
}

.header-left h1 {
    font-family: 'Fraunces', Georgia, serif;
    font-size: clamp(1.2rem, 1.1rem + 0.7vw, 1.72rem);
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--ink-strong);
    white-space: nowrap;
    text-shadow: 0 4px 22px rgba(0, 0, 0, 0.38);
}

.header-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    flex: 1;
    overflow-x: auto;
    scrollbar-width: none;
}

.header-nav::-webkit-scrollbar {
    display: none;
}

.nav-btn {
    background: color-mix(in srgb, var(--surface-1), transparent 35%);
    color: var(--ink-soft);
    border: 1px solid rgba(95, 225, 139, 0.24);
    padding: 9px 17px;
    border-radius: 999px;
    cursor: pointer;
    font-family: 'Work Sans', sans-serif;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    white-space: nowrap;
    width: auto;
    min-width: max-content;
    flex: 0 0 auto;
    transition: none;
    position: relative;
}

.nav-btn::before {
    content: "";
    position: absolute;
    left: 12px;
    right: 12px;
    top: -10px;
    height: 2px;
    border-radius: 999px;
    background: transparent;
    transition: background-color 0.26s ease;
}

.header-nav .nav-btn {
    width: auto;
}

.nav-btn:hover {
    border-color: rgba(95, 225, 139, 0.68);
    color: var(--ink-strong);
    background: rgba(29, 185, 84, 0.17);
}

.nav-btn:hover::before {
    background: rgba(46, 215, 96, 0.9);
}

.nav-btn.active {
    background: linear-gradient(130deg, #2ed760, #1db954);
    color: #04180c;
    border-color: transparent;
    box-shadow: none;
}

.nav-btn.active::before {
    background: rgba(46, 215, 96, 0.95);
}

#mobile-graph-toggle,
#mobile-graph-exit {
    display: none;
    background: rgba(14, 18, 25, 0.88);
    color: var(--ink-strong);
    border: 1px solid rgba(95, 225, 139, 0.58);
    border-radius: 999px;
    font-family: 'Work Sans', sans-serif;
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 700;
    padding: 8px 12px;
    width: auto;
    min-width: max-content;
    flex: 0 0 auto;
    cursor: pointer;
}

#mobile-graph-exit {
    position: fixed;
    top: max(10px, env(safe-area-inset-top));
    right: 10px;
    z-index: 90;
    background: rgba(14, 18, 25, 0.94);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.34);
}

#main-content {
    flex: 1;
    position: relative;
    overflow: hidden;
}

#graph-container {
    position: absolute;
    inset: 0;
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.015), rgba(0, 0, 0, 0.14));
}

#sidebar {
    position: absolute;
    top: clamp(12px, 2vw, 24px);
    left: clamp(12px, 2vw, 24px);
    width: min(385px, calc(100% - 24px));
    max-height: calc(100% - 24px);
    overflow-y: auto;
    z-index: 25;
    background: transparent;
    border: none;
    scrollbar-width: thin;
    scrollbar-color: rgba(95, 225, 139, 0.4) transparent;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: panel-rise 0.38s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.panel {
    background:
        linear-gradient(160deg, rgba(120, 255, 176, 0.06), transparent 42%),
        var(--surface-1);
    border: 1px solid var(--border-soft);
    box-shadow: 0 26px 46px rgba(5, 8, 12, 0.5);
    backdrop-filter: blur(8px);
    border-radius: 18px;
    padding: 20px;
    margin-bottom: 14px;
}

.panel h2 {
    font-family: 'Fraunces', Georgia, serif;
    font-size: clamp(1.04rem, 0.95rem + 0.38vw, 1.32rem);
    font-weight: 700;
    margin-bottom: 15px;
    letter-spacing: 0.01em;
    color: var(--ink-strong);
}

.panel p {
    color: var(--ink-soft);
    line-height: 1.45;
}

.info-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.info-card {
    border: 1px solid rgba(95, 225, 139, 0.25);
    border-radius: 12px;
    padding: 11px 12px;
    background: rgba(20, 25, 34, 0.52);
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.info-card:hover {
    border-color: rgba(95, 225, 139, 0.58);
    transform: translateY(-1px);
}

.info-card h3 {
    margin: 0 0 6px;
    font-family: 'Work Sans', sans-serif;
    font-size: 0.79rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--ink-strong);
}

.info-card p {
    margin: 0;
    font-size: 0.8rem;
    color: var(--ink-soft);
    line-height: 1.45;
}

#add-transition-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.input-group {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-group label {
    font-size: 0.73rem;
    color: var(--ink-soft);
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

input[type="text"],
input[type="password"],
input[type="email"] {
    background: rgba(32, 38, 50, 0.76);
    border: 1px solid rgba(232, 200, 161, 0.23);
    border-radius: 12px;
    padding: 11px 12px;
    color: var(--text-primary);
    font-family: 'Work Sans', sans-serif;
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.23s ease, background-color 0.23s ease, box-shadow 0.23s ease;
}

input[type="text"]:focus,
input[type="password"]:focus,
input[type="email"]:focus {
    border-color: rgba(46, 215, 96, 0.72);
    background: rgba(39, 45, 60, 0.86);
    box-shadow: 0 0 0 3px rgba(29, 185, 84, 0.2);
}

.autocomplete-results {
    position: absolute;
    top: 62px;
    left: 0;
    right: 0;
    background: rgba(18, 22, 31, 0.97);
    border: 1px solid rgba(232, 200, 161, 0.23);
    border-radius: 12px;
    max-height: 230px;
    overflow-y: auto;
    z-index: 100;
    display: none;
    box-shadow: 0 16px 30px rgba(6, 8, 12, 0.55);
}

.graph-search-help {
    margin-top: 11px;
    font-size: 0.76rem;
    color: var(--ink-soft);
}

.details-panel {
    margin-top: 14px;
    padding: 13px;
    border-radius: 12px;
    border: 1px solid rgba(95, 225, 139, 0.28);
    background: rgba(17, 23, 33, 0.74);
}

.details-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 10px;
}

.details-panel-header h3 {
    margin: 0;
    font-family: 'Fraunces', Georgia, serif;
    font-size: 1rem;
    color: var(--ink-strong);
}

#details-clear-highlight-btn {
    width: auto;
    min-width: 92px;
    font-size: 0.7rem;
    padding: 7px 10px;
}

#details-content ul {
    margin: 6px 0 0;
    padding-left: 0;
    list-style: none;
}

.related-song-btn {
    width: 100%;
    margin-top: 6px;
    border-radius: 10px;
    border: 1px solid rgba(95, 225, 139, 0.26);
    background: rgba(24, 32, 45, 0.72);
    color: var(--text-primary);
    text-align: left;
    text-transform: none;
    letter-spacing: 0;
    font-size: 0.82rem;
    font-weight: 600;
    padding: 8px 10px;
    transition: none;
}

.related-song-btn:hover {
    background: rgba(29, 185, 84, 0.16);
    border-color: rgba(95, 225, 139, 0.56);
}

.details-empty {
    margin-top: 6px;
    color: var(--ink-soft);
    font-size: 0.8rem;
}

.autocomplete-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 11px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.autocomplete-item:hover {
    background: rgba(29, 185, 84, 0.15);
}

.autocomplete-item img {
    width: 38px;
    height: 38px;
    border-radius: 7px;
    object-fit: cover;
    border: 1px solid rgba(255, 240, 213, 0.23);
}

.autocomplete-info {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    flex: 1;
}

.autocomplete-name,
.graph-search-result-name {
    font-size: 0.84rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.autocomplete-artist,
.autocomplete-meta,
.graph-search-result-meta {
    font-size: 0.74rem;
    color: var(--ink-soft);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

input[type="file"] {
    display: none;
}

.file-preview {
    font-size: 0.82rem;
    color: var(--ink-soft);
    padding: 10px;
    background: rgba(31, 36, 49, 0.62);
    border: 1px dashed rgba(95, 225, 139, 0.42);
    border-radius: 12px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

.file-preview:hover {
    border-color: rgba(95, 225, 139, 0.78);
    background: rgba(36, 42, 58, 0.82);
}

button {
    padding: 11px 12px;
    border-radius: 999px;
    border: none;
    font-family: 'Work Sans', sans-serif;
    font-size: 0.82rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.18s ease, filter 0.22s ease, box-shadow 0.22s ease;
    width: 100%;
}

button:active {
    transform: none;
}

.btn-green {
    background: linear-gradient(140deg, #2ed760, #1db954);
    color: #04180c;
    box-shadow: 0 10px 24px rgba(25, 143, 66, 0.34);
}

.btn-green:hover {
    filter: brightness(1.04);
    transform: translateY(-1px);
}

.btn-outline {
    background: rgba(24, 29, 40, 0.35);
    color: var(--text-primary);
    border: 1px solid rgba(95, 225, 139, 0.56);
}

.btn-outline:hover {
    border-color: rgba(95, 225, 139, 0.84);
    background: rgba(29, 185, 84, 0.1);
}

.btn-subtle {
    background: rgba(24, 29, 40, 0.36);
    color: var(--ink-soft);
    border: 1px dashed rgba(95, 225, 139, 0.44);
    font-weight: 600;
    font-size: 0.74rem;
    border-radius: 10px;
    padding: 9px;
}

.btn-danger-subtle {
    margin-top: 10px;
    background: rgba(46, 24, 26, 0.42);
    color: #ffb9ad;
    border: 1px solid #824a44;
    border-radius: 10px;
    padding: 10px;
    font-size: 0.78rem;
    font-weight: 700;
}

.btn-danger-subtle:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.danger-zone {
    margin-top: 14px;
    padding-top: 10px;
    border-top: 1px solid rgba(95, 225, 139, 0.26);
}

.danger-help {
    margin-top: 10px;
    margin-bottom: 8px;
    font-size: 0.75rem;
    color: #f2b2a5;
}

.danger-label {
    font-size: 0.72rem;
    color: var(--ink-soft);
    display: block;
    margin-bottom: 6px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

#reset-confirm-input {
    font-size: 0.8rem;
    padding: 10px;
}

.modal {
    position: fixed;
    inset: 0;
    display: none;
    z-index: 1000;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(6, 8, 12, 0.72);
    z-index: 1;
}

.modal-content {
    position: relative;
    background:
        linear-gradient(160deg, rgba(120, 255, 176, 0.06), transparent 40%),
        rgba(22, 27, 37, 0.95);
    border-radius: 16px;
    border: 1px solid rgba(95, 225, 139, 0.32);
    box-shadow: 0 22px 48px rgba(0, 0, 0, 0.55);
    max-width: 540px;
    width: 92%;
    max-height: 84vh;
    overflow-y: auto;
    z-index: 2;
    animation: panel-rise 0.28s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.modal-content.edge-modal {
    max-width: 460px;
}

.transition-modal-title {
    margin: 0 0 10px;
    font-size: 1.12rem;
    color: var(--ink-strong);
}

.transition-flow {
    display: grid;
    gap: 10px;
}

.transition-track-card {
    border: 1px solid rgba(95, 225, 139, 0.3);
    border-radius: 12px;
    background: rgba(24, 32, 44, 0.62);
    padding: 10px 11px;
}

.transition-track-label {
    display: block;
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-soft);
    margin-bottom: 4px;
}

.transition-track-name {
    margin: 0;
    font-size: 0.92rem;
    color: var(--text-primary);
    font-weight: 600;
}

.transition-flow-connector {
    height: 24px;
    position: relative;
    margin: -2px 0;
}

.transition-flow-connector::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 2px;
    width: 2px;
    height: 14px;
    transform: translateX(-50%);
    background: linear-gradient(to bottom, rgba(46, 215, 96, 0.85), rgba(46, 215, 96, 0.15));
}

.transition-flow-connector::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0;
    width: 8px;
    height: 8px;
    transform: translateX(-50%) rotate(45deg);
    border-right: 2px solid rgba(46, 215, 96, 0.85);
    border-bottom: 2px solid rgba(46, 215, 96, 0.85);
}

.transition-shot {
    margin-top: 12px;
}

.transition-meta {
    margin-top: 12px;
    font-size: 0.8rem;
    color: var(--ink-soft);
}

.transition-delete-btn {
    margin-top: 14px;
    width: 100%;
}

.modal-welcome {
    max-width: 640px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px;
    border-bottom: 1px solid rgba(95, 225, 139, 0.24);
}

.modal-header h2,
.modal-header h3 {
    font-family: 'Fraunces', Georgia, serif;
    font-size: 1.2rem;
    color: var(--ink-strong);
}

.modal-close {
    background: none;
    border: none;
    color: var(--ink-soft);
    font-size: 28px;
    cursor: pointer;
    width: auto;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-body {
    padding: 18px;
}

.modal-footer {
    display: flex;
    gap: 10px;
    padding: 14px 18px;
    border-top: 1px solid rgba(95, 225, 139, 0.24);
}

.modal-footer button {
    flex: 1;
}

.modal-footer button:not(:first-child) {
    margin-left: 10px;
}

#modal-body img,
#details-content img {
    max-width: 100%;
    border-radius: 8px;
    margin-top: 10px;
}

#modal-body p,
#details-content p {
    font-size: 0.9rem;
    color: var(--ink-soft);
    margin: 8px 0;
}

#modal-body strong,
#details-content strong {
    color: var(--ink-strong);
}

.graph-search-result {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.hidden {
    display: none !important;
}

@keyframes panel-rise {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

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

@media (max-width: 900px) {
    #top-header {
        padding: 0 14px;
    }

    .header-content {
        gap: 10px;
        align-items: flex-start;
        flex-direction: column;
        padding: 12px 0 10px;
    }

    .header-left h1 {
        font-size: 1.08rem;
    }

    .header-nav {
        width: 100%;
        justify-content: flex-start;
        gap: 8px;
        flex-wrap: wrap;
    }

    .nav-btn {
        padding: 8px 12px;
        font-size: 0.7rem;
        letter-spacing: 0.05em;
    }

    #mobile-graph-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    #main-content {
        display: flex;
        flex-direction: column;
    }

    #sidebar {
        position: static;
        width: 100%;
        max-height: none;
        overflow: visible;
        padding: 10px;
    }

    .panel {
        border-radius: 15px;
        margin-bottom: 11px;
    }

    #graph-container {
        position: relative;
        min-height: 63dvh;
    }

    .modal-content {
        width: 96%;
        max-height: 88vh;
    }
}

@media (max-width: 600px) {
    #top-header {
        padding: 0 10px;
    }

    #sidebar {
        padding: 8px;
    }

    .header-nav {
        gap: 6px;
    }

    .nav-btn,
    #mobile-graph-toggle {
        padding: 7px 10px;
        font-size: 0.66rem;
    }

    .panel {
        padding: 15px;
    }

    #graph-container {
        min-height: 58dvh;
    }

    .modal-header,
    .modal-body,
    .modal-footer {
        padding: 14px;
    }

    .modal-footer {
        flex-direction: column;
    }

    .modal-footer button:not(:first-child) {
        margin-left: 0;
    }
}

body.mobile-graph-only #top-header,
body.mobile-graph-only #sidebar {
    display: none;
}

body.mobile-graph-only #main-content {
    height: 100vh;
    height: 100dvh;
}

body.mobile-graph-only #graph-container {
    position: fixed;
    inset: 0;
    min-height: 100vh;
    min-height: 100dvh;
    z-index: 35;
}

body.mobile-graph-only #mobile-graph-exit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}