/* ===== Base / Reset ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --color-bg: #0f1115;
    --color-surface: #171a21;
    --color-surface-2: #1f232c;
    --color-border: #2a2f3a;
    --color-text: #e8eaed;
    --color-text-dim: #9aa1ad;
    --color-primary: #5b8def;
    --color-primary-dark: #4470c4;
    --color-danger: #e25c5c;
    --color-success: #4cb87c;
    --radius: 10px;
    --font-main: 'Segoe UI', system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
}

body {
    font-family: var(--font-main);
    background: var(--color-bg);
    color: var(--color-text);
}

a { color: inherit; text-decoration: none; }

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

input, select, textarea {
    font-family: inherit;
    color: inherit;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 18px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 600;
    transition: all .15s ease;
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
}
.btn-primary:hover { background: var(--color-primary-dark); }

.btn-secondary {
    background: var(--color-surface-2);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}
.btn-secondary:hover { background: var(--color-border); }

.btn-ghost {
    background: transparent;
    color: var(--color-danger);
    border: 1px solid transparent;
}
.btn-ghost:hover { background: rgba(226,92,92,0.1); }

.btn-outline {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text);
}
.btn-outline:hover { background: var(--color-surface-2); }

.btn-block { width: 100%; }
.btn-small { padding: 7px 12px; font-size: 13px; }

/* ===== Login page ===== */
.login-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at top, #1a1e27, #0a0c10);
}

.login-card {
    width: 380px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 40px 36px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.login-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.logo-icon {
    font-size: 28px;
    color: var(--color-primary);
}

.login-logo h1 {
    font-size: 20px;
    font-weight: 700;
}

.login-sub {
    text-align: center;
    color: var(--color-text-dim);
    font-size: 13px;
    margin-bottom: 24px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.login-form label {
    font-size: 12px;
    color: var(--color-text-dim);
    margin-top: 10px;
}

.login-form input {
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 11px 14px;
    font-size: 14px;
    outline: none;
}
.login-form input:focus { border-color: var(--color-primary); }

.login-form button { margin-top: 18px; }

.login-hint {
    margin-top: 18px;
    text-align: center;
    font-size: 12px;
    color: var(--color-text-dim);
}
.login-hint code {
    background: var(--color-surface-2);
    padding: 2px 6px;
    border-radius: 4px;
}

.alert {
    padding: 10px 14px;
    border-radius: var(--radius);
    font-size: 13px;
    margin-bottom: 6px;
}
.alert-error {
    background: rgba(226,92,92,0.12);
    color: #ff8b8b;
    border: 1px solid rgba(226,92,92,0.3);
}

/* ===== Toast ===== */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 12px 20px;
    border-radius: var(--radius);
    box-shadow: 0 10px 30px rgba(0,0,0,0.4);
    opacity: 0;
    transform: translateY(10px);
    transition: all .25s ease;
    pointer-events: none;
    z-index: 9999;
    font-size: 14px;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.toast-success { border-color: var(--color-success); }
.toast.toast-error { border-color: var(--color-danger); }

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}
.modal-overlay.show { display: flex; }

.modal-box {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 14px;
    width: 480px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.modal-large { width: 720px; }

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 22px;
    border-bottom: 1px solid var(--color-border);
}
.modal-header h3 { font-size: 16px; }

.modal-close {
    font-size: 22px;
    color: var(--color-text-dim);
    line-height: 1;
}
.modal-close:hover { color: var(--color-text); }

.modal-body {
    padding: 22px;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 16px 22px;
    border-top: 1px solid var(--color-border);
}

.preview-content {
    background: #000;
    color: #fff;
    font-size: 22px;
    line-height: 1.6;
    padding: 30px;
    border-radius: 8px;
    min-height: 200px;
}
.preview-content h2 { margin-bottom: 12px; }
.preview-content p { margin-bottom: 14px; }