:root {
    color-scheme: light dark;
    --bg: #f3f6f4;
    --safe-bg: #e8f1ed;
    --surface: #ffffff;
    --surface-strong: #eef3f0;
    --text: #18211d;
    --muted: #66736c;
    --border: #d8e0dc;
    --accent: #116c54;
    --accent-strong: #0d5845;
    --accent-soft: #d8eee7;
    --danger: #a83232;
    --success: #11714f;
    --shadow: 0 24px 70px rgba(24, 33, 29, 0.14);
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
    background-color: var(--safe-bg);
}

body {
    min-height: 100vh;
    margin: 0;
    background-color: var(--safe-bg);
    background:
        radial-gradient(circle at top left, rgba(17, 108, 84, 0.16), transparent 34rem),
        linear-gradient(140deg, #f7faf8 0%, var(--bg) 54%, #e8eee9 100%);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    letter-spacing: 0;
}

body.auth-page,
body.control-page {
    display: grid;
    place-items: center;
    padding:
        max(24px, env(safe-area-inset-top))
        max(24px, env(safe-area-inset-right))
        max(24px, env(safe-area-inset-bottom))
        max(24px, env(safe-area-inset-left));
}

.container,
.app-shell {
    width: min(100%, 440px);
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid rgba(216, 224, 220, 0.9);
    border-radius: 8px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(18px);
}

.auth-card {
    padding: 30px 24px 24px;
    text-align: center;
}

.app-shell {
    width: min(100%, 560px);
    padding: 24px;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 58px;
    height: 58px;
    margin: 0 auto 18px;
    border-radius: 8px;
    background: var(--accent);
    color: #ffffff;
    font-size: 28px;
    font-weight: 800;
    box-shadow: 0 16px 28px rgba(17, 108, 84, 0.25);
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0;
    text-transform: uppercase;
}

h1 {
    margin: 0 0 22px;
    font-size: 30px;
    line-height: 1.12;
}

.panel-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 24px;
}

.panel-header h1 {
    margin-bottom: 0;
    font-size: 28px;
}

form {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 14px;
}

input {
    width: 100%;
    min-height: 54px;
    padding: 0 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: #ffffff;
    color: var(--text);
    font-size: 17px;
    outline: none;
    transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(17, 108, 84, 0.14);
}

button,
.button {
    width: 100%;
    min-height: 58px;
    padding: 0 18px;
    border: 0;
    border-radius: 8px;
    background: var(--accent);
    color: #ffffff;
    cursor: pointer;
    font-size: 18px;
    font-weight: 800;
    letter-spacing: 0;
    text-align: center;
    transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

button:hover,
.button:hover {
    background: var(--accent-strong);
    box-shadow: 0 14px 26px rgba(17, 108, 84, 0.2);
    transform: translateY(-1px);
}

button:active,
.button:active {
    transform: translateY(1px);
    box-shadow: none;
}

button:focus-visible,
.button:focus-visible,
a:focus-visible {
    outline: 4px solid rgba(17, 108, 84, 0.22);
    outline-offset: 3px;
}

.button-container form {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.button-container .button {
    min-height: 148px;
    padding: 18px;
    background: linear-gradient(180deg, #16785f 0%, var(--accent) 100%);
    font-size: 22px;
    line-height: 1.16;
}

.button-container .button:nth-child(2) {
    background: linear-gradient(180deg, #34465b 0%, #263749 100%);
}

.button-container .button:nth-child(2):hover {
    background: linear-gradient(180deg, #2e4054 0%, #202f3f 100%);
}

.link-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-top: 22px;
}

.single-link {
    margin-top: 20px;
}

a {
    color: var(--accent-strong);
    font-weight: 700;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.error,
.success {
    width: 100%;
    margin: 0 0 16px;
    padding: 12px 14px;
    border-radius: 8px;
    font-weight: 700;
}

.error {
    background: #fdeaea;
    color: var(--danger);
}

.success {
    background: #e5f5ef;
    color: var(--success);
}

.message-container {
    position: fixed;
    top: 50%;
    left: 50%;
    width: min(calc(100vw - 48px), 420px);
    transform: translate(-50%, -50%);
    padding: 34px 24px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    box-shadow: var(--shadow);
    color: var(--accent-strong);
    font-size: 34px;
    font-weight: 900;
    text-align: center;
}

@media (max-width: 560px) {
    body.auth-page,
    body.control-page {
        padding:
            max(16px, env(safe-area-inset-top))
            max(16px, env(safe-area-inset-right))
            max(16px, env(safe-area-inset-bottom))
            max(16px, env(safe-area-inset-left));
    }

    .auth-card,
    .app-shell {
        padding: 22px 18px;
    }

    .panel-header {
        align-items: stretch;
        flex-direction: column;
    }

    .button-container form {
        grid-template-columns: 1fr;
    }

    .button-container .button {
        min-height: 120px;
    }
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #101614;
        --safe-bg: #101614;
        --surface: #17201d;
        --surface-strong: #202b27;
        --text: #edf5f1;
        --muted: #a6b4ad;
        --border: #2e3b36;
        --accent: #4ec3a1;
        --accent-strong: #8fe0c8;
        --accent-soft: #16352d;
        --danger: #ffadad;
        --success: #9de6c7;
        --shadow: 0 24px 70px rgba(0, 0, 0, 0.42);
    }

    body {
        background:
            radial-gradient(circle at top left, rgba(78, 195, 161, 0.12), transparent 32rem),
            linear-gradient(140deg, #0d1211 0%, var(--bg) 100%);
    }

    html {
        background-color: var(--safe-bg);
    }

    .container,
    .app-shell {
        background: rgba(23, 32, 29, 0.9);
    }

    input {
        background: var(--surface-strong);
        color: var(--text);
    }

    .error {
        background: rgba(168, 50, 50, 0.2);
    }

    .success {
        background: rgba(17, 113, 79, 0.22);
    }
}