:root {
            color-scheme: light;
            --font-ui: "TT Commons Pro", "Segoe UI", Arial, sans-serif;
            --page-bg: #f3f1ec;
            --text: #111111;
            --muted: #666666;
            --panel: rgba(255, 255, 255, 0.96);
            --panel-border: rgba(0, 0, 0, 0.08);
            --panel-shadow: 0 22px 56px rgba(0, 0, 0, 0.14);
            --button-top: #2f69c0;
            --button-bottom: #255cb0;
            --button-border: #1f5fbf;
            --button-top-hover: #285cac;
            --button-bottom-hover: #204e98;
            --button-border-hover: #204e98;
            --button-shadow: 0 10px 22px rgba(31, 95, 191, 0.18);
            --button-shadow-hover: 0 14px 28px rgba(31, 95, 191, 0.22);
            --link-border: rgba(15, 79, 168, 0.28);
            --link-border-strong: rgba(15, 79, 168, 0.62);
            --accent-line: rgba(15, 79, 168, 0.18);
            --error-bg: #fff3f3;
            --error-border: #e2b4b4;
            --error-text: #8f1d1d;
            --success-bg: #f2fbf4;
            --success-border: #b9d6bf;
            --success-text: #1f5d2b;
            --overlay-top: rgba(255, 255, 255, 0.66);
            --overlay-bottom: rgba(255, 255, 255, 0.82);
            --overlay-left: rgba(255, 255, 255, 0.88);
            --overlay-right: rgba(255, 255, 255, 0.48);
            --background-filter: grayscale(6%) brightness(0.62);
            --title-weight: 700;
        }

        :root[data-theme="dark"] {
            color-scheme: dark;
            --page-bg: #0f1114;
            --text: #f2f2f2;
            --muted: #b7b7b7;
            --panel: rgba(20, 22, 27, 0.92);
            --panel-border: rgba(255, 255, 255, 0.08);
            --panel-shadow: 0 10px 28px rgba(0, 0, 0, 0.22);
            --button-top: #3d78d0;
            --button-bottom: #2d62b7;
            --button-border: #4b7dca;
            --button-top-hover: #467fda;
            --button-bottom-hover: #345fad;
            --button-border-hover: #5b8bd4;
            --button-shadow: 0 4px 12px rgba(0, 0, 0, 0.16);
            --button-shadow-hover: 0 6px 16px rgba(0, 0, 0, 0.2);
            --link-border: rgba(125, 170, 245, 0.3);
            --link-border-strong: rgba(125, 170, 245, 0.74);
            --accent-line: rgba(125, 170, 245, 0.28);
            --error-bg: rgba(111, 29, 29, 0.24);
            --error-border: rgba(226, 124, 124, 0.36);
            --error-text: #f2b7b7;
            --success-bg: rgba(27, 79, 44, 0.28);
            --success-border: rgba(121, 191, 143, 0.34);
            --success-text: #bfe3c8;
            --overlay-top: rgba(12, 14, 18, 0.72);
            --overlay-bottom: rgba(12, 14, 18, 0.88);
            --overlay-left: rgba(12, 14, 18, 0.84);
            --overlay-right: rgba(12, 14, 18, 0.7);
            --background-filter: grayscale(6%) brightness(0.38);
            --title-weight: 650;
        }

        html,
        body {
            min-height: 100%;
        }

        body {
            position: relative;
            background: var(--page-bg);
            color: var(--text);
            font-family: var(--font-ui);
            line-height: 1.6;
            transition: background-color 0.2s ease, color 0.2s ease;
        }

        .page-background {
            position: fixed;
            inset: 0;
            background-color: #d9d9d4;
            background-image: url('/assets/login.png');
            background-size: cover;
            background-position: center;
            filter: var(--background-filter);
        }

        .page-overlay {
            position: fixed;
            inset: 0;
            background:
                linear-gradient(to bottom, var(--overlay-top), var(--overlay-bottom)),
                linear-gradient(to right, var(--overlay-left), var(--overlay-right));
        }

        .page-overlay::after {
            content: "";
            position: absolute;
            inset: 0;
            background:
                radial-gradient(circle at 18% 22%, rgba(15, 79, 168, 0.08), transparent 26%),
                radial-gradient(circle at 82% 78%, rgba(0, 0, 0, 0.05), transparent 24%);
        }

        :root[data-theme="dark"] .page-overlay::after {
            background: none;
        }

        .hero-shell {
            position: relative;
            z-index: 1;
            width: min(1180px, 100%);
            min-height: 100vh;
            margin: 0 auto;
            display: flex;
            align-items: center;
            padding: 32px 20px;
        }

        .hero-card {
            width: 100%;
            display: grid;
            grid-template-columns: minmax(0, 1.1fr) minmax(340px, 430px);
            gap: 36px;
            align-items: end;
        }

        .hero-copy {
            max-width: 660px;
            padding: 0 8px 22px 8px;
        }

        .hero-copy h1 {
            margin-bottom: 16px;
            color: var(--text);
            font-size: clamp(2.9rem, 5.5vw, 5.1rem);
            font-weight: var(--title-weight);
            letter-spacing: -0.04em;
            line-height: 0.94;
        }

        .brand-kicker,
        .section-label,
        .theme-switch,
        .discord-btn,
        .flash {
            font-family: var(--font-ui);
        }

        .brand-kicker,
        .section-label {
            color: var(--muted);
            font-size: 0.88rem;
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }

        .brand-kicker {
            margin-bottom: 12px;
            display: inline-block;
            padding-bottom: 6px;
            border-bottom: 2px solid var(--accent-line);
        }

        .login-card {
            background: var(--panel);
            border: 1px solid var(--panel-border);
            border-radius: 8px;
            box-shadow: var(--panel-shadow);
            padding: 32px 30px;
            backdrop-filter: blur(4px);
            transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .login-card-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            margin-bottom: 10px;
        }

        .theme-controls {
            display: flex;
            align-items: center;
        }

        .theme-toggle {
            appearance: none;
            border: 1px solid var(--panel-border);
            background: rgba(255, 255, 255, 0.18);
            color: var(--muted);
            font-family: var(--font-ui);
            line-height: 1;
            width: 44px;
            height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 999px;
            cursor: pointer;
            transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
        }

        .theme-toggle:hover {
            background: rgba(255, 255, 255, 0.28);
            border-color: rgba(31, 95, 191, 0.28);
            color: var(--text);
        }

        .theme-toggle:focus {
            outline: 2px solid rgba(31, 95, 191, 0.35);
            outline-offset: 2px;
        }

        .theme-icon {
            width: 18px;
            height: 18px;
            display: block;
        }

        .theme-icon-moon {
            display: none;
        }

        :root[data-theme="dark"] .theme-icon-sun {
            display: none;
        }

        :root[data-theme="dark"] .theme-icon-moon {
            display: block;
        }

        .login-card h2 {
            margin-bottom: 10px;
            font-size: 2rem;
            line-height: 1.15;
        }

        .intro-text,
        .project-note {
            color: var(--text);
            opacity: 0.84;
            font-size: 1.03rem;
        }

        .intro-text {
            margin-bottom: 20px;
        }

        .project-note a {
            color: inherit;
            text-decoration: none;
            border-bottom: 1px solid var(--link-border);
            transition: border-color 0.15s ease, color 0.15s ease;
        }

        .project-note a:hover {
            color: #7daaf5;
            border-bottom-color: var(--link-border-strong);
        }

        .discord-btn {
            display: inline-flex;
            width: 100%;
            align-items: center;
            justify-content: center;
            gap: 12px;
            margin-bottom: 18px;
            border: 1px solid var(--button-border);
            border-radius: 4px;
            background: linear-gradient(180deg, var(--button-top) 0%, var(--button-bottom) 100%);
            color: #ffffff;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 700;
            padding: 13px 18px;
            box-shadow: var(--button-shadow);
            transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
        }

        .discord-btn:hover {
            background: linear-gradient(180deg, var(--button-top-hover) 0%, var(--button-bottom-hover) 100%);
            border-color: var(--button-border-hover);
            transform: translateY(-1px);
            box-shadow: var(--button-shadow-hover);
        }

        .discord-icon {
            width: 24px;
            height: 24px;
            filter: brightness(0) invert(1);
        }

        .flash {
            margin-bottom: 18px;
            border: 1px solid;
            border-radius: 4px;
            padding: 12px 14px;
            font-size: 0.98rem;
            line-height: 1.45;
        }

        .flash.error {
            background: var(--error-bg);
            border-color: var(--error-border);
            color: var(--error-text);
        }

        .flash.success {
            background: var(--success-bg);
            border-color: var(--success-border);
            color: var(--success-text);
        }

        @media (max-width: 860px) {
            .hero-shell {
                padding: 24px 16px;
            }

            .hero-card {
                grid-template-columns: 1fr;
                gap: 24px;
                align-items: start;
            }

            .hero-copy {
                padding: 0;
            }
        }

        @media (max-width: 640px) {
            .hero-shell {
                align-items: flex-start;
                padding: 18px 12px 24px;
            }

            .hero-card {
                gap: 16px;
            }

            .hero-copy h1 {
                font-size: clamp(2.2rem, 12vw, 3.4rem);
                line-height: 0.98;
            }

            .brand-kicker {
                font-size: 0.78rem;
                margin-bottom: 10px;
            }

            .login-card {
                padding: 20px 16px;
                border-radius: 6px;
            }

            .login-card-header {
                margin-bottom: 8px;
            }

            .login-card h2 {
                font-size: 1.65rem;
            }

            .intro-text,
            .project-note,
            .flash {
                font-size: 0.96rem;
            }

            .discord-btn,
            .theme-toggle {
                min-height: 44px;
            }

            .discord-btn {
                padding: 12px 16px;
            }
        }