/**
 * Federated Login - Styles
 *
 * Full-page login card using the Nodey OKO Design System.
 * Based on Inspector Musubi auth styles.
 */

/* ===== CSS Variables — Nodey OKO Design System ===== */
:root {
    /* --- Nodey Palette: Neutral --- */
    --neutral-50: #f3f3f3;
    --neutral-100: #d7d7d7;
    --neutral-200: #bfbfbf;
    --neutral-300: #a8a8a8;
    --neutral-400: #8c8c8c;
    --neutral-500: #737373;
    --neutral-600: #5b5b5b;
    --neutral-700: #404040;
    --neutral-800: #252525;
    --neutral-850: #16161A;
    --neutral-900: #000009;

    /* --- Nodey Palette: Success --- */
    --success-500: #22C55E;

    /* --- Nodey Palette: Destructive --- */
    --destructive-500: #EF4444;

    /* --- Nodey Palette: Hues --- */
    --hue-blue: #4790FF;

    /* --- Nodey: Shades --- */
    --shade-white: #FFFFFF;
    --shade-black: #000000;

    /* --- Nodey Semantic: Backgrounds --- */
    --bg-primary: var(--shade-black);
    --bg-elevated: var(--neutral-850);
    --bg-muted: var(--neutral-800);

    /* --- Nodey Semantic: Borders --- */
    --border-subtle: var(--neutral-800);
    --border-default: var(--neutral-700);

    /* --- Nodey Semantic: Text --- */
    --text-primary: var(--neutral-50);
    --text-secondary: var(--neutral-400);
    --text-muted: var(--neutral-500);

    /* --- Nodey Semantic: Accent --- */
    --accent-main: var(--hue-blue);
    --accent-confirm: var(--success-500);
    --accent-danger: var(--destructive-500);

    /* --- Typography --- */
    --font-size-h3: 24px;
    --font-size-body-sm: 14px;
    --font-size-body-xs: 12px;

    /* --- Spacing --- */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* --- Borders & Shadows --- */
    --border-radius-sm: 4px;
    --border-radius-md: 6px;
    --border-radius-lg: 8px;
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);

    /* --- Transitions --- */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.2s ease;
}

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

html, body {
    height: 100%;
    font-family: 'Graphik', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: var(--font-size-body-sm);
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--accent-main);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes cardFadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ===== Full-Page Login Layout ===== */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--spacing-md);
}

/* ===== Login Card ===== */
.login-card {
    background-color: var(--bg-elevated);
    border: 1px solid var(--border-default);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 400px;
    width: 100%;
    padding: var(--spacing-xl);
    animation: cardFadeIn var(--transition-normal) ease-out;
}

/* ===== Login Card Header ===== */
.login-card-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.login-brand {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.login-brand-logo {
    width: 48px;
    height: 48px;
}

.login-card-header h2 {
    font-size: var(--font-size-h3);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.login-card-header p {
    font-size: var(--font-size-body-sm);
    color: var(--text-secondary);
}

/* ===== Login Form ===== */
.login-form .login-form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.login-form label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-body-xs);
    font-weight: 500;
    color: var(--text-secondary);
}

.login-form input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-body-sm);
    color: var(--text-primary);
    background-color: var(--bg-muted);
    border: 1px solid var(--border-default);
    border-radius: var(--border-radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.login-form input:focus {
    outline: none;
    border-color: var(--accent-main);
    box-shadow: 0 0 0 3px rgba(71, 144, 255, 0.15);
}

.login-form input:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background-color: var(--bg-muted);
}

/* ===== Password Input ===== */
.password-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.password-input-wrapper input {
    padding-right: 44px;
}

.password-toggle-btn {
    position: absolute;
    right: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    color: var(--text-muted);
    background: none;
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.password-toggle-btn:hover {
    color: var(--text-secondary);
    background-color: var(--bg-muted);
}

.password-toggle-btn:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(71, 144, 255, 0.15);
}

/* ===== Login Error & Success Messages ===== */
.login-error,
.login-success {
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-body-xs);
    border-radius: var(--border-radius-md);
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    transition: opacity var(--transition-normal), max-height var(--transition-normal), padding var(--transition-normal), margin var(--transition-normal);
}

.login-error.visible,
.login-success.visible {
    opacity: 1;
    max-height: 100px;
}

.login-error {
    color: var(--accent-danger);
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.login-success {
    color: var(--accent-confirm);
    background-color: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

/* ===== Submit Button ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-body-sm);
    font-weight: 500;
    border: none;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-primary {
    background-color: var(--accent-main);
    color: var(--shade-white);
}

.btn-primary:hover {
    background-color: #3a7de6;
}

.btn-primary:active {
    background-color: #2f6fd4;
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

#login-submit-btn {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-body-sm);
    font-weight: 500;
    position: relative;
}

#login-submit-btn .btn-spinner {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    display: none;
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

#login-submit-btn.loading {
    color: transparent;
}

#login-submit-btn.loading .btn-spinner {
    display: block;
}

/* ===== Forgot Password Link ===== */
.forgot-password-row {
    display: flex;
    justify-content: flex-end;
    margin-top: var(--spacing-xs);
}

.forgot-password-link {
    display: inline;
    color: var(--text-muted);
    font-size: 0.8rem;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.forgot-password-link:hover {
    color: var(--accent-main);
    text-decoration: underline;
}

/* ===== Providers Loading Indicator ===== */
.providers-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: var(--spacing-lg) 0;
    color: var(--text-muted);
    font-size: var(--font-size-body-sm);
}

.providers-loading .btn-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top-color: var(--accent-main);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ===== Login Divider ===== */
.login-divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: var(--spacing-md) 0;
}

.login-divider::before,
.login-divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--border-default);
}

.login-divider span {
    padding: 0 var(--spacing-md);
    color: var(--text-muted);
    font-size: var(--font-size-body-xs);
}

/* ===== Google Sign-In Button ===== */
.google-signin-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 12px 20px;
    background: #ffffff;
    color: #1f1f1f;
    border: none;
    border-radius: var(--border-radius-md);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.google-signin-btn:hover {
    background: #f8f8f8;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.google-signin-btn:active {
    background: #f0f0f0;
}

.google-signin-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.google-signin-btn:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--accent-main);
}

.google-signin-btn .google-icon {
    flex-shrink: 0;
}

.google-signin-btn.loading {
    pointer-events: none;
}

.google-signin-btn.loading span:last-child {
    display: none;
}

.google-signin-btn.loading::after {
    content: '';
    width: 18px;
    height: 18px;
    border: 2px solid rgba(31, 31, 31, 0.2);
    border-top-color: #1f1f1f;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ===== Link Styles ===== */
.login-form a {
    color: var(--accent-main);
    font-size: var(--font-size-body-xs);
    text-decoration: none;
}

.login-form a:hover {
    text-decoration: underline;
}

/* ===== Focus States for Accessibility ===== */
.login-form input:focus-visible,
#login-submit-btn:focus-visible,
.password-toggle-btn:focus-visible,
.google-signin-btn:focus-visible,
.forgot-password-link:focus-visible {
    outline: 2px solid var(--accent-main);
    outline-offset: 2px;
}