/**
 * Login Page Styles
 * Glass morphism design matching the app aesthetic
 */

/* CSS Variables */
:root {
    --color-primary: #1f2937;
    --color-primary-light: #374151;
    --color-white: #ffffff;
    --color-light: #f5f5f5;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-success: #16a34a;
    --color-success-light: #dcfce7;
    --color-error: #dc2626;
    --color-error-light: #fef2f2;
    --color-warning: #f59e0b;
    --color-microsoft: #0078d4;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.12);

    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-spring: 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

/* Body */
.login-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #e8eef3 0%, #f5f5f5 50%, #eef2f5 100%);
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Login Container */
.login-container {
    max-width: 420px;
    width: 100%;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: var(--shadow-glass);
    overflow: hidden;
    animation: fadeInUp 0.5s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Header */
.login-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
    padding: 32px 24px;
    text-align: center;
}

.login-icon {
    width: 64px;
    height: 64px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 26px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.login-header h1 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 6px;
    letter-spacing: -0.3px;
}

.login-subtitle {
    font-size: 14px;
    opacity: 0.85;
    font-weight: 400;
}

/* Content */
.login-content {
    padding: 28px 24px;
}

/* Messages */
.message {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-size: 14px;
    font-weight: 500;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.error-message {
    background: var(--color-error-light);
    color: var(--color-error);
    border: 1px solid rgba(220, 38, 38, 0.2);
}

.success-message {
    background: var(--color-success-light);
    color: var(--color-success);
    border: 1px solid rgba(22, 163, 74, 0.2);
}

.message i {
    font-size: 16px;
    flex-shrink: 0;
}

/* Form Elements */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: 8px;
}

.input-wrapper {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gray-400);
    font-size: 15px;
    transition: color var(--transition-fast);
    pointer-events: none;
}

.form-input {
    width: 100%;
    padding: 14px 16px 14px 46px;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    font-size: 15px;
    font-family: inherit;
    color: var(--color-gray-800);
    background: var(--color-white);
    transition: all var(--transition-normal);
}

.form-input::placeholder {
    color: var(--color-gray-400);
}

.form-input:hover {
    border-color: var(--color-gray-300);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(31, 41, 55, 0.1);
}

.form-input:focus + .input-icon,
.input-wrapper:focus-within .input-icon {
    color: var(--color-primary);
}

.form-input:disabled {
    background-color: var(--color-gray-100);
    color: var(--color-gray-500);
    cursor: not-allowed;
}

/* Code Input */
.code-input {
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Courier New', monospace;
    font-size: 24px;
    font-weight: 600;
    text-align: center;
    letter-spacing: 10px;
    padding-left: 16px;
    padding-right: 16px;
}

.code-input::placeholder {
    letter-spacing: 10px;
    color: var(--color-gray-300);
}

/* Input Hint */
.input-hint {
    font-size: 12px;
    color: var(--color-gray-500);
    margin-top: 6px;
}

/* Buttons */
.btn {
    width: 100%;
    padding: 14px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-spring);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 20px rgba(31, 41, 55, 0.3);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-secondary {
    background: transparent;
    color: var(--color-gray-600);
    border: 2px solid var(--color-gray-200);
    margin-top: 12px;
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-gray-50);
    border-color: var(--color-gray-300);
}

.btn-microsoft {
    background: var(--color-white);
    color: var(--color-gray-700);
    border: 2px solid var(--color-gray-200);
    box-shadow: var(--shadow-sm);
}

.btn-microsoft:hover:not(:disabled) {
    background: var(--color-gray-50);
    border-color: var(--color-microsoft);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), 0 0 20px rgba(0, 120, 212, 0.15);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.microsoft-logo {
    flex-shrink: 0;
}

/* Login Hint */
.login-hint {
    text-align: center;
    font-size: 13px;
    color: var(--color-gray-500);
    margin-top: 14px;
}

/* Spinner */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--color-white);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Footer */
.login-footer {
    background: var(--color-gray-50);
    padding: 18px 24px;
    text-align: center;
    border-top: 1px solid var(--color-gray-100);
}

.login-footer strong {
    display: block;
    color: var(--color-gray-700);
    font-size: 14px;
    font-weight: 600;
}

.login-footer span {
    color: var(--color-gray-500);
    font-size: 12px;
}

/* Responsive */
@media (max-width: 480px) {
    .login-body {
        padding: 12px;
        align-items: flex-start;
        padding-top: 40px;
    }

    .login-container {
        border-radius: var(--radius-lg);
    }

    .login-header {
        padding: 24px 20px;
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    }

    .login-icon {
        width: 56px;
        height: 56px;
        font-size: 22px;
    }

    .login-header h1 {
        font-size: 20px;
    }

    .login-content {
        padding: 24px 20px;
    }

    .login-footer {
        padding: 16px 20px;
    }

    .code-input {
        font-size: 20px;
        letter-spacing: 6px;
    }

    .code-input::placeholder {
        letter-spacing: 6px;
    }
}

/* Very small phones (320px and below) */
@media (max-width: 320px) {
    .login-body {
        padding: 8px;
        padding-top: 20px;
    }

    .login-header {
        padding: 20px 16px;
    }

    .login-icon {
        width: 48px;
        height: 48px;
        font-size: 20px;
        margin-bottom: 12px;
    }

    .login-header h1 {
        font-size: 18px;
    }

    .login-subtitle {
        font-size: 13px;
    }

    .login-content {
        padding: 20px 16px;
    }

    .form-input {
        padding: 12px 14px 12px 40px;
        font-size: 14px;
    }

    .input-icon {
        left: 14px;
        font-size: 14px;
    }

    .code-input {
        font-size: 18px;
        letter-spacing: 4px;
        padding: 12px 10px;
    }

    .code-input::placeholder {
        letter-spacing: 4px;
    }

    .btn {
        padding: 12px 16px;
        font-size: 14px;
    }

    .login-footer {
        padding: 14px 16px;
    }

    .login-footer strong {
        font-size: 13px;
    }

    .login-footer span {
        font-size: 11px;
    }

    .message {
        padding: 12px 14px;
        font-size: 13px;
        gap: 8px;
    }

    .form-label {
        font-size: 12px;
    }

    .input-hint {
        font-size: 11px;
    }
}

/* Dark mode support (optional) */
@media (prefers-color-scheme: dark) {
    /* Keep light theme for login page for consistency */
}

/* Focus visible for accessibility */
.btn:focus-visible,
.form-input:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .login-body {
        background: white;
    }

    .login-container {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}