:root {
    --text: #f7f5f8;
    --muted: #aaa8b2;
    --line: white;
}

html {
    box-sizing: border-box;
}

*, *::before, *::after {
    box-sizing: inherit;
}

body {
    margin: 0;
    background: black;
    color: white;
    display: flex;
    flex-direction: column;
    align-items: center;
}

main {
    max-width: 900px;
    margin: auto;
    padding: 48px 18px 64px;
}

header {
    width: 100%;
    padding-bottom: 9px;
    margin-bottom: 25px;
    text-align: center;
    border-bottom: 1px solid white;
}

h1 {
    padding-top: 25px;
    margin-bottom: 18px;

    --base-text: #ffffff;

    font-weight: 800;
    color: #ffffff;

    background-image: linear-gradient(
      90deg,
      var(--base-text) 0%, var(--base-text) 33%,
      #ff4d4d 38%, #ff9f43 42%, #ffe14d 46%,
      #4dff9f 50%, #4dc3ff 54%, #b366ff 58%,
      var(--base-text) 63%, var(--base-text) 100%
    );
    background-size: 300% 100%;
    background-repeat: no-repeat;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;

    animation: h1-neon-shine 4.8s ease-out forwards;
}

@keyframes h1-neon-shine {
    0%   { background-position: 100% 0;
           text-shadow: 0 0 2px rgba(255,77,210,.15), 0 0 6px rgba(77,210,255,.1); }
    50%  { text-shadow: 0 0 10px rgba(255,77,210,.75), 0 0 26px rgba(77,210,255,.55), 0 0 42px rgba(179,102,255,.35); }
    100% { background-position: 0% 0; text-shadow: none; }
}

h1.page-title {
    font-size: clamp(26px, 5vw, 36px);
    letter-spacing: -.03em;
    padding-top: 0;
    color: var(--text);
    animation: none;
}

input {
    font-size: 18px;
    margin-bottom: 10px;
}

button {
    width: 50%;
    color: white;
    border: none;
    border-radius: 8px;
    margin: 25px auto 15px;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    transition: 0.2s;
}

button:hover {
    transform: translateY(-2px);
}

button:active {
    transform: translateY(1px);
}

video {
    width: 90%;
    max-width: 800px;
    height: 100px;
    margin: auto;
}

canvas {
    display: none;
}

.hidden {
    display: none;
}

.premium-toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    opacity: 0;
    background: linear-gradient(135deg, #4facfe, #ff5fd8);
    color: white;
    padding: 18px 26px;
    border-radius: 16px;
    font-weight: bold;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
    transition:
      opacity 0.4s ease,
      transform 0.4s ease;
    z-index: 9999;
    text-align: center;
}

.premium-toast.show {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.premium-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    opacity: 0;
    transition: opacity 0.45s ease;
    z-index: 9998;
}

.premium-overlay.show {
    opacity: 1;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translate(-50%, 10px);
    }
    to {
        opacity: 1;
        transform: translate(-50%, 0);
    }
}

.header-telop {
    overflow: hidden;
    white-space: nowrap;
    width: 100%;
    background: black;
    color: white;
    font-size: 1.1rem;
    margin-top: 16px;
    padding: 8px 0;
}

.header-telop span {
    display: inline-block;
    will-change: transform;
}

.back-link:hover {
    text-decoration: underline;
}

#main-container {
    width: 100%;
    max-width: 800px;
    text-align: center;
}

.show-notice {
    width: 85%;
    margin: 0 auto 8px;
    padding: 8px 12px;
    border-radius: 6px;
    background: rgba(255, 165, 0, 0.12);
    color: #ff8c00;
    font-size: 13px;
    text-align: left;
    opacity: 1;
    transition: opacity 1.2s ease;
}

.show-notice.green {
    background: rgba(154, 212, 90, 0.12);
    color: #9ad45a;
}

.show-notice.red {
    background: rgba(239, 68, 68, 0.12);
    color: #ef4444;
}

.show-notice.fade-out {
    opacity: 0;
}

.show-notice.hidden {
    display: none;
}

.guide {
    width: 85%;
    margin: 10px auto 10px;
    text-align: left;
}

.preset-btn {
    width: 85%;
    color: orange;
    background: transparent;
    border: none;
    font-size: 14px;
    cursor: pointer;
    margin: 0 0 5px 0;
    padding: 0;
    text-align: left;
}

.preset-btn:active {
    opacity: 0.6;
}

#applyPresetBtn,
#savePresetBtn,
#deletePresetBtn {
    display: none;
}

#deletePresetBtn {
    color: red;
}

.telop-input-wrapper {
    position: relative;
    width: 87%;
    height: 35px;
    max-width: 777px;
    margin: 20px auto 0;
    display: flex;
    align-items: center;
}

#telopInput {
    width: 100%;
    height: 100%;
    padding-right: 32px;
}

#clearTelopBtn {
    position: absolute;
    right: 6px;
    top: 37%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    margin: auto;
    padding: 0;
    border-radius: 50%;
    border: none;
    background: rgba(0, 0, 0, 0.3);
    color: #fff;
    font-size: 14px;
    line-height: 20px;
    cursor: pointer;
    display: none;
}

#updateTelopBtn {
    background-color: #ff3860;
}

#updateTelopBtn:hover {
    background-color: #ff1f4b;
}

#updateTelopBtn:active {
    background-color: #e6003e;
}

.effect-status {
    width: 85%;
    margin: 0 auto 8px;
    text-align: left;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

#previewWrapper {
    width: 85%;
    background: #000;
    margin: 10px auto 10px;
}

#telopPreview {
    font-size: 18px;
    display: block;
    text-align: left;
}

.premium-section {
    width: 85%;
    margin: 15px auto 5px;
    padding: 15px 15px 7px 15px;
    text-align: left;
    border: 1px solid #333;
}

.color-picker {
    margin-top: 20px;
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
}

.color-picker label {
    display: flex;
    align-items: center;
}

.color-picker input[type="color"] {
    margin-bottom: 0;
    vertical-align: middle;
}

.speed-section {
    width: 85%;
    margin: 0 auto 20px;
}

.speed-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    font-size: 15px;
}

#speedLabel {
    color: rgba(255, 255, 255, 0.55);
    font-size: 13px;
}

.speed-slider-wrapper {
    position: relative;
}

.speed-slider-wrapper::before {
    content: '';
    position: absolute;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.6);
    left: 50%;
    transform: translateX(-50%);
    top: 6px;
    pointer-events: none;
    z-index: 0;
}

#speedSlider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 28px;
    background: transparent;
    cursor: pointer;
    position: relative;
    z-index: 1;
    margin-bottom: 0;
}

#speedSlider::-webkit-slider-runnable-track {
    height: 5px;
    border-radius: 3px;
    background: linear-gradient(to right, #1e90ff, #2ecc71 50%, #ff3860);
}

#speedSlider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    margin-top: -9px;
    border-radius: 50%;
    background: white;
    cursor: pointer;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
}

#speedSlider::-moz-range-track {
    height: 5px;
    border-radius: 3px;
    background: linear-gradient(to right, #1e90ff, #2ecc71 50%, #ff3860);
}

#speedSlider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border: none;
    border-radius: 50%;
    background: white;
    cursor: pointer;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
}

.gradient-section,
.font-section,
.text-effect-section,
.bg-effect-section {
    width: 100%;
    margin: 0 0 15px 0;
    padding: 0;
    text-align: left;
    border: none;
}

.gradient-section h3 {
    margin: 0 0 10px;
    font-size: 16px;
}

.premium-title {
    background: linear-gradient(
        to right,
        #ff4fd8,
        #6cf2ff
    );

    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;

    display: flex;
    align-items: center;
    font-size: 16px;
    margin: 0 0 10px;
}

.badge {
    background: linear-gradient(180deg, #0b0e13, #05070a);
    border-radius: 6px;
    box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.08),
    0 2px 6px rgba(0, 0, 0, 0.6),
    inset 0 0 0 1px rgba(255, 255, 255, 0.04);
    letter-spacing: 0.05em;
    display: inline-block;
    font-size: 12px;
    margin-left: 10px;
    padding: 2px 6px;
}

.badge span {
    background: linear-gradient(
        90deg,
        #4fc3ff,
        #ff4fd8
    );
    text-shadow: 0 0 6px rgba(255, 79, 216, 0.15);

    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

@keyframes premiumBadgeGlowTwice {
    0% {
        box-shadow:
          0 0 0 1px rgba(0, 0, 0, 0.08),
          0 2px 6px rgba(0, 0, 0, 0.6),
          inset 0 0 0 1px rgba(255, 255, 255, 0.04);
    }
    15% {
        box-shadow:
        0 0 14px rgba(255, 79, 216, 0.55),
        0 0 28px rgba(79, 195, 255, 0.35),
        inset 0 0 0 1px rgba(255, 255, 255, 0.08);
    }
    30% {
        box-shadow:
        0 0 0 rgba(0, 0, 0, 0),
        0 2px 6px rgba(0, 0, 0, 0.6),
        inset 0 0 0 1px rgba(255, 255, 255, 0.04);
    }
    55% {
        box-shadow:
        0 0 18px rgba(79, 195, 255, 0.6),
        0 0 32px rgba(255, 79, 216, 0.4),
        inset 0 0 0 1px rgba(255, 255, 255, 0.1);
    }
    70% {
        box-shadow:
        0 0 0 rgba(0, 0, 0, 0),
        0 2px 6px rgba(0, 0, 0, 0.6),
        inset 0 0 0 1px rgba(255, 255, 255, 0.04);
    }
    100% {
        box-shadow:
          0 0 0 1px rgba(0, 0, 0, 0.08),
          0 2px 6px rgba(0, 0, 0, 0.6),
          inset 0 0 0 1px rgba(255, 255, 255, 0.04);
    }
}

.badge.glow {
    animation: premiumBadgeGlowTwice 2.2s ease;
}

.premium-locked {
    text-align: center;
}

.unlock-btn {
    background: linear-gradient(135deg, #ff5fd8, #6aa9ff);
    border: none;
    color: white;
    border-radius: 8px;
    cursor: pointer;
    margin: 5px auto 13px;
}

.gradient-direction {
    margin: 15px 0 15px 10px;
}

.gradient-direction label {
    margin-right: 12px;
}

.gradient-colors {
    margin: 5px 0 10px;
    display: flex;
    align-items: center;
    justify-content: space-around;
}

.gradient-colors label {
    display: flex;
    align-items: center;
}

.gradient-colors label input {
    margin: auto 10px;
}

.swap-gradient-btn {
    width: auto;
    margin: 0;
    padding: 4px 10px;
    font-size: 18px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    color: white;
    cursor: pointer;
    display: none;
}

.font-selector,
.effect-selector {
    position: relative;
}

#fontSelect,
#textEffectSelect,
#bgEffectSelect {
    width: 100%;
    padding: 10px 12px;
    padding-right: 40px;
    border: 1px solid #333;
    border-radius: 0;
    background-color: black;
    color: white;
    font-size: 16px;
    cursor: pointer;
    appearance: none;
}

.font-selector::after,
.effect-selector::after {
    content: '▼';
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: white;
    font-size: 12px;
}

#createTelopBtn {
    background-color: #2ecc71;
}

#createTelopBtn:hover {
    background-color: #27ae60;
}

#createTelopBtn:active {
    background-color: #219150;
}

.creating-notice {
    margin: 25px auto 10px;
    /* display: none; */
    font-size: 18px;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

#catAnim {
    width: 100px;
    height: 100px;
    margin: 0 auto;
}

#cancelCreatingBtn {
    width: 30px;
    height: 30px;
    margin: 20px auto 0;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: rgba(120, 0, 0, 0.6);
    color: rgba(255, 255, 255, 0.4);
    font-size: 22px;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

#cancelCreatingBtn:hover {
    background: rgba(150, 0, 0, 0.75);
    color: rgba(255, 255, 255, 0.6);
}

#cancelCreatingBtn:active {
    background: rgba(90, 0, 0, 0.75);
}

.help-text {
    width: 85%;
    margin: 10px auto 10px;
    text-align: left;
    color: rgba(255, 255, 255, 0.5);
    font-size: 12px;
    letter-spacing: 0.03em;
}

#pipBtn {
    background-color: #1e90ff;
}

#pipBtn:hover {
    background-color: #0d6efd;
}

#pipBtn:active {
    background-color: #0b5ed7;
}

#pipBtn.active {
    background-color: #ff4fd8;
}

.site-footer {
    width: 100%;
    margin-top: 48px;
    border-top: 1px solid var(--line);
}

.footer-inner {
    margin: 0 auto;
    padding: 28px 0 40px;
}

.footer-credit {
    margin: 0 0 8px;
    color: var(--muted);
    font-size: 13px;
    text-align: center;
}

#x-logo {
    width: 24px;
}

.footer-social {
    margin: 16px 0;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.footer-links a {
    color: var(--muted);
    font-size: 12px;
    text-decoration: none;
}

.footer-links a:hover {
    text-decoration: underline;
}

.premium-key-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

.premium-key-modal.is-hidden {
    display: none;
}

.premium-key-box {
    background: linear-gradient(180deg, #0b0e13, #05070a);
    border-radius: 14px;
    padding: 20px 18px;
    width: 90%;
    max-width: 320px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6);
    color: white;
}

.premium-key-box h3 {
    margin: 0 0 6px;
    font-size: 15px;
}

.premium-key-note {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.55);
    margin-bottom: 12px;
}

.x-link {
    display: inline-block;
    color: orange;
    font-weight: 600;
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 165, 0, 0.4);
}

.x-link:hover {
    color: #ffb347;
    border-bottom-color: rgba(255, 165, 0, 0.6);
}

.premium-key-box input {
    width: 100%;
    padding: 8px 10px;
    border-radius: 8px;
    border: none;
    background: #0e1118;
    color: white;
    margin-bottom: 14px;
}

.premium-key-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

.premium-key-actions button {
    padding: 6px 12px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
}

.premium-key-actions .secondary {
    background: #1a1e26;
    color: rgba(255, 255, 255, 0.65);
    font-weight: normal;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
    transition: background 0.15 ease, color 0.15s ease;
    opacity: 0.9;
}

.premium-key-actions .primary {
    background: linear-gradient(135deg, #4fc3ff, #ff4fd8);
    color: white;
    font-weight: bold;
}

.card {
    padding: clamp(18px, 4vw, 28px);
    margin-top: 16px;
    background: linear-gradient(145deg, rgba(255, 255, 255, .035), transparent 45%), var(--surface);
    border: 1px solid var(--line-subtle);
    border-radius: 12px;
    box-shadow: 0 18px 45px rgba(0, 0, 0, .22);
}

.privacy-content {
    padding-top: 14px;
    color: var(--muted);
    font-size: 12px;
    line-height: 1.75;
}

.privacy-content p {
    margin: 0 0 12px;
}

.privacy-content h2 {
    margin: 18px 0 4px;
    color: var(--text);
    font-size: 13px;
}

.privacy-content a {
    color: #75e5bd;
}

.privacy-updated {
    margin-bottom: 0 !important;
    color: #85838e;
}

.back-link {
    display: block;
    width: fit-content;
    margin: 20px 20px 0 auto;
    color: orange;
    font-size: 13px;
    text-decoration: none;
  }

#snowCanvas {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none; /* 操作を邪魔しない */
    z-index: 9997;
}

@media (max-width: 650px) {
    main {
        padding-top: 32px;
    }
}

@media (max-width: 420px) {
    main {
        padding: 24px 12px 40px;
    }
}