/**
 * Modern Login Page Styles - Tailwind-Inspired Design
 * ------------------------------------------------
 * Enterprise SaaS login experience with dark mode support
 * Inspired by modern Tailwind UI patterns
 *
 * @version 2.0.0
 * @date 2026-02-17
 */

/* ==========================================================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ========================================================================== */

:root {
    /* Light mode colors */
    --login-primary: #0d47a1;
    --login-primary-hover: #0a3578;
    --login-bg-light: #f3f4f6;
    --login-card-light: #ffffff;
    --login-text-light: #1f2937;
    --login-subtext-light: #6b7280;
    --login-border-light: #e5e7eb;
    --login-input-bg-light: #f9fafb;

    /* Gradient accent colors */
    --login-gradient-start: #0d47a1;
    --login-gradient-mid: #3b82f6;
    --login-gradient-end: #60a5fa;
}

/* Dark mode colors */
.dark {
    --login-bg-dark: #111827;
    --login-card-dark: #1f2937;
    --login-text-dark: #f9fafb;
    --login-subtext-dark: #9ca3af;
    --login-border-dark: #374151;
    --login-input-bg-dark: #374151;
}

/* ==========================================================================
   LOGIN PAGE LAYOUT
   ========================================================================== */

.login-page-modern {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background-color: var(--login-bg-light);
    position: relative;
    overflow: hidden;
    transition: background-color 0.3s ease;
}

.dark .login-page-modern {
    background-color: var(--login-bg-dark);
}

/* ==========================================================================
   ANIMATED BACKGROUND EFFECTS
   ========================================================================== */

.login-bg-effects {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    opacity: 0.4;
}

.dark .login-bg-effects {
    opacity: 0.2;
}

.login-bg-gradient {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom right, rgba(191, 219, 254, 0.5) 0%, transparent 60%);
}

.dark .login-bg-gradient {
    background: linear-gradient(to bottom right, rgba(30, 64, 175, 0.3) 0%, transparent 60%);
}

.login-blob {
    position: absolute;
    border-radius: 50%;
    mix-blend-mode: multiply;
    filter: blur(64px);
    opacity: 0.3;
    animation: blob-float 20s ease-in-out infinite;
}

.dark .login-blob {
    mix-blend-mode: screen;
}

.login-blob-1 {
    width: 24rem;
    height: 24rem;
    background-color: rgba(191, 219, 254, 0.8);
    bottom: -6rem;
    right: -6rem;
}

.dark .login-blob-1 {
    background-color: rgba(30, 64, 175, 0.5);
}

.login-blob-2 {
    width: 24rem;
    height: 24rem;
    background-color: rgba(221, 214, 254, 0.8);
    top: -6rem;
    left: -6rem;
    animation-delay: -7s;
}

.dark .login-blob-2 {
    background-color: rgba(49, 46, 129, 0.5);
}

@keyframes blob-float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -30px) scale(1.05);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.95);
    }
}

/* ==========================================================================
   LOGIN CONTAINER
   ========================================================================== */

.login-container {
    width: 100%;
    max-width: 28rem;
    position: relative;
    z-index: 10;
}

/* ==========================================================================
   LOGIN CARD
   ========================================================================== */

.login-card-modern {
    background: var(--login-card-light);
    border-radius: 1rem;
    box-shadow:
        0 10px 15px -3px rgba(0, 0, 0, 0.1),
        0 4px 6px -2px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--login-border-light);
    overflow: hidden;
    animation: card-slide-up 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.dark .login-card-modern {
    background: var(--login-card-dark);
    border-color: var(--login-border-dark);
    box-shadow:
        0 20px 25px -5px rgba(0, 0, 0, 0.3),
        0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

@keyframes card-slide-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   CARD HEADER / BRAND SECTION
   ========================================================================== */

.login-brand {
    padding: 2.5rem 2rem 1.5rem;
    text-align: center;
}

.login-brand-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.login-brand-logo .logo-icon {
    width: 2.75rem;
    height: 2.75rem;
    background: var(--login-primary);
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 6px -1px rgba(13, 71, 161, 0.3);
}

.login-brand-logo .logo-icon i {
    color: white;
    font-size: 1.5rem;
}

.login-brand-logo span:not(.logo-icon) {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--login-primary);
    letter-spacing: -0.025em;
}

.login-brand-tagline {
    color: var(--login-subtext-light);
    font-size: 0.875rem;
    font-weight: 500;
    margin: 0;
}

.dark .login-brand-tagline {
    color: var(--login-subtext-dark);
}

/* ==========================================================================
   CARD BODY
   ========================================================================== */

.login-body {
    padding: 0 2rem 2rem;
}

/* ==========================================================================
   SSO BUTTON - Microsoft Style
   ========================================================================== */

.btn-sso-modern {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 0.9375rem;
    font-weight: 600;
    color: #ffffff;
    background-color: #111827;
    border: none;
    border-radius: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.dark .btn-sso-modern {
    background-color: #ffffff;
    color: #111827;
}

.btn-sso-modern:hover {
    background-color: #1f2937;
    color: #ffffff;
    transform: translateY(-1px);
    box-shadow: 0 6px 12px -2px rgba(0, 0, 0, 0.2);
    text-decoration: none;
}

.dark .btn-sso-modern:hover {
    background-color: #f3f4f6;
    color: #111827;
}

.btn-sso-modern:focus {
    outline: none;
    box-shadow: 0 0 0 2px #ffffff, 0 0 0 4px #111827;
}

.dark .btn-sso-modern:focus {
    box-shadow: 0 0 0 2px #1f2937, 0 0 0 4px #ffffff;
}

/* Microsoft Logo - 4 color grid */
.microsoft-logo {
    width: 20px;
    height: 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
    flex-shrink: 0;
}

.microsoft-logo div {
    width: 100%;
    height: 100%;
}

.microsoft-logo .ms-red { background-color: #f25022; }
.microsoft-logo .ms-green { background-color: #7fba00; }
.microsoft-logo .ms-blue { background-color: #00a4ef; }
.microsoft-logo .ms-yellow { background-color: #ffb900; }

.sso-hint {
    text-align: center;
    margin-top: 0.75rem;
    font-size: 0.75rem;
    color: var(--login-subtext-light);
}

.dark .sso-hint {
    color: var(--login-subtext-dark);
}

/* ==========================================================================
   DIVIDER
   ========================================================================== */

.login-divider {
    position: relative;
    margin: 2rem 0;
}

.login-divider-line {
    width: 100%;
    height: 1px;
    background-color: var(--login-border-light);
}

.dark .login-divider-line {
    background-color: var(--login-border-dark);
}

.login-divider-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 0 1rem;
    background: var(--login-card-light);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--login-subtext-light);
}

.dark .login-divider-text {
    background: var(--login-card-dark);
    color: var(--login-subtext-dark);
}

/* ==========================================================================
   DEV MODE BADGE
   ========================================================================== */

.dev-mode-badge {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background-color: rgba(219, 234, 254, 0.5);
    border: 1px solid rgba(147, 197, 253, 0.5);
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    font-size: 0.75rem;
    color: #1e40af;
}

.dark .dev-mode-badge {
    background-color: rgba(30, 58, 138, 0.3);
    border-color: rgba(59, 130, 246, 0.3);
    color: #93c5fd;
}

.dev-mode-badge i {
    font-size: 0.875rem;
    color: #2563eb;
}

.dark .dev-mode-badge i {
    color: #60a5fa;
}

/* ==========================================================================
   FORM INPUTS
   ========================================================================== */

.login-form-group {
    margin-bottom: 1.25rem;
}

.login-form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--login-text-light);
    margin-bottom: 0.375rem;
}

.dark .login-form-group label {
    color: var(--login-text-dark);
}

.login-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.login-input-wrapper .form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    padding-left: 2.75rem;
    font-size: 0.875rem;
    color: var(--login-text-light);
    background: var(--login-input-bg-light);
    border: 1px solid var(--login-border-light);
    border-radius: 0.75rem;
    transition: all 0.15s ease;
}

.dark .login-input-wrapper .form-control {
    color: var(--login-text-dark);
    background: var(--login-input-bg-dark);
    border-color: var(--login-border-dark);
}

.login-input-wrapper .form-control::placeholder {
    color: #9ca3af;
}

.dark .login-input-wrapper .form-control::placeholder {
    color: #6b7280;
}

.login-input-wrapper .form-control:hover {
    border-color: #9ca3af;
}

.dark .login-input-wrapper .form-control:hover {
    border-color: #6b7280;
}

.login-input-wrapper .form-control:focus {
    outline: none;
    border-color: var(--login-primary);
    box-shadow: 0 0 0 3px rgba(13, 71, 161, 0.15);
}

.dark .login-input-wrapper .form-control:focus {
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.login-input-wrapper .input-icon {
    position: absolute;
    left: 0.75rem;
    color: #9ca3af;
    font-size: 1.125rem;
    pointer-events: none;
}

.dark .login-input-wrapper .input-icon {
    color: #6b7280;
}

/* Password toggle button */
.login-input-wrapper .password-toggle {
    position: absolute;
    right: 0.75rem;
    background: none;
    border: none;
    padding: 0.25rem;
    color: #9ca3af;
    cursor: pointer;
    transition: color 0.15s ease;
}

.login-input-wrapper .password-toggle:hover {
    color: #6b7280;
}

.dark .login-input-wrapper .password-toggle {
    color: #6b7280;
}

.dark .login-input-wrapper .password-toggle:hover {
    color: #9ca3af;
}

.login-input-wrapper .password-toggle:focus {
    outline: none;
}

/* Password field with toggle */
.login-input-wrapper.has-toggle .form-control {
    padding-right: 2.75rem;
}

/* Error state */
.login-input-wrapper .form-control.is-invalid,
.login-form-group.has-error .form-control {
    border-color: #dc2626;
}

.login-form-group.has-error .form-control:focus {
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.15);
}

.login-error-text {
    display: block;
    margin-top: 0.375rem;
    font-size: 0.75rem;
    color: #dc2626;
}

/* ==========================================================================
   REMEMBER ME & SUBMIT ROW
   ========================================================================== */

.login-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 1.5rem;
    padding-top: 0.5rem;
}

.login-remember {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.login-remember input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    accent-color: var(--login-primary);
    cursor: pointer;
    border-radius: 0.25rem;
}

.login-remember label {
    font-size: 0.875rem;
    color: var(--login-subtext-light);
    cursor: pointer;
    margin: 0;
}

.dark .login-remember label {
    color: var(--login-subtext-dark);
}

/* ==========================================================================
   SUBMIT BUTTON
   ========================================================================== */

.btn-login-submit {
    padding: 0.625rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: #ffffff;
    background: var(--login-primary);
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px rgba(13, 71, 161, 0.2);
}

.btn-login-submit:hover {
    background: var(--login-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(13, 71, 161, 0.3);
}

.btn-login-submit:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(13, 71, 161, 0.2);
}

.btn-login-submit:focus {
    outline: none;
    box-shadow: 0 0 0 2px #ffffff, 0 0 0 4px var(--login-primary);
}

/* ==========================================================================
   FORGOT PASSWORD LINK
   ========================================================================== */

.login-footer-links {
    margin-top: 2rem;
    text-align: center;
}

.login-footer-links a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--login-primary);
    text-decoration: none;
    transition: color 0.15s ease;
}

.login-footer-links a:hover {
    color: var(--login-primary-hover);
}

.dark .login-footer-links a {
    color: #60a5fa;
}

.dark .login-footer-links a:hover {
    color: #93c5fd;
}

/* ==========================================================================
   GRADIENT ACCENT BAR
   ========================================================================== */

.login-accent-bar {
    height: 0.375rem;
    width: 100%;
    background: linear-gradient(
        to right,
        var(--login-gradient-start),
        var(--login-gradient-mid),
        var(--login-gradient-end)
    );
}

/* ==========================================================================
   FLASH MESSAGES
   ========================================================================== */

.login-alerts {
    margin-bottom: 1.25rem;
}

.login-alert {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
    animation: alert-slide-down 0.3s ease;
}

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

.login-alert.alert-success {
    background: rgba(209, 250, 229, 0.8);
    border: 1px solid #10b981;
    color: #065f46;
}

.dark .login-alert.alert-success {
    background: rgba(6, 78, 59, 0.3);
    color: #6ee7b7;
}

.login-alert.alert-danger {
    background: rgba(254, 226, 226, 0.8);
    border: 1px solid #ef4444;
    color: #991b1b;
}

.dark .login-alert.alert-danger {
    background: rgba(127, 29, 29, 0.3);
    color: #fca5a5;
}

.login-alert.alert-warning {
    background: rgba(254, 243, 199, 0.8);
    border: 1px solid #f59e0b;
    color: #92400e;
}

.dark .login-alert.alert-warning {
    background: rgba(120, 53, 15, 0.3);
    color: #fcd34d;
}

.login-alert.alert-info {
    background: rgba(219, 234, 254, 0.8);
    border: 1px solid #3b82f6;
    color: #1e40af;
}

.dark .login-alert.alert-info {
    background: rgba(30, 58, 138, 0.3);
    color: #93c5fd;
}

.login-alert .btn-close {
    margin-left: auto;
    opacity: 0.6;
    filter: none;
}

.login-alert .btn-close:hover {
    opacity: 1;
}

/* ==========================================================================
   FOOTER TEXT
   ========================================================================== */

.login-page-footer {
    position: relative;
    z-index: 10;
    text-align: center;
    margin-top: 2rem;
    font-size: 0.75rem;
    color: var(--login-subtext-light);
}

.dark .login-page-footer {
    color: var(--login-subtext-dark);
}

.login-page-footer a {
    color: var(--login-subtext-light);
    text-decoration: none;
    transition: color 0.15s ease;
}

.dark .login-page-footer a {
    color: var(--login-subtext-dark);
}

.login-page-footer a:hover {
    color: var(--login-text-light);
}

.dark .login-page-footer a:hover {
    color: var(--login-text-dark);
}

/* ==========================================================================
   DARK MODE TOGGLE (Optional Enhancement)
   ========================================================================== */

.dark-mode-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 50;
    padding: 0.5rem;
    background: var(--login-card-light);
    border: 1px solid var(--login-border-light);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.dark .dark-mode-toggle {
    background: var(--login-card-dark);
    border-color: var(--login-border-dark);
}

.dark-mode-toggle:hover {
    transform: scale(1.05);
}

.dark-mode-toggle i {
    font-size: 1.25rem;
    color: var(--login-text-light);
}

.dark .dark-mode-toggle i {
    color: var(--login-text-dark);
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */

@media (max-width: 480px) {
    .login-page-modern {
        padding: 1rem;
    }

    .login-brand {
        padding: 2rem 1.5rem 1.25rem;
    }

    .login-body {
        padding: 0 1.5rem 1.5rem;
    }

    .login-brand-logo .logo-icon {
        width: 2.5rem;
        height: 2.5rem;
    }

    .login-brand-logo span:not(.logo-icon) {
        font-size: 1.5rem;
    }

    .login-actions {
        flex-direction: column;
        gap: 1rem;
    }

    .login-remember {
        order: 2;
    }

    .btn-login-submit {
        width: 100%;
        order: 1;
    }
}

/* ==========================================================================
   ACCESSIBILITY
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    .login-blob,
    .login-card-modern,
    .login-alert {
        animation: none;
    }

    .btn-sso-modern,
    .btn-login-submit,
    .dark-mode-toggle {
        transition: none;
    }
}

/* High contrast mode */
@media (forced-colors: active) {
    .login-card-modern {
        border: 2px solid CanvasText;
    }

    .btn-sso-modern,
    .btn-login-submit {
        border: 2px solid CanvasText;
    }
}

/* Focus visible for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--login-primary);
    outline-offset: 2px;
}