/* ============================================
 * Login Page Styles
 * Modern, premium dark theme
 * ============================================ */

@import url('design-tokens.css');

/* ============================================
 * BASE STYLES
 * ============================================ */

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family-sans);
    font-weight: var(--font-weight-regular);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    overflow: hidden;
    position: relative;
}

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

.animated-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    background: linear-gradient(
        135deg,
        var(--color-bg-base) 0%,
        var(--color-bg-elevated) 50%,
        var(--color-bg-base) 100%
    );
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
}

.animated-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(
        circle at 30% 30%,
        rgba(59, 130, 246, 0.08) 0%,
        transparent 50%
    ),
    radial-gradient(
        circle at 70% 70%,
        rgba(139, 92, 246, 0.06) 0%,
        transparent 50%
    );
    animation: orbFloat 20s ease-in-out infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(5%, 5%) scale(1.05); }
    50% { transform: translate(0, 10%) scale(1); }
    75% { transform: translate(-5%, 5%) scale(0.95); }
}

/* Floating shapes */
.floating-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 25s ease-in-out infinite;
}

.floating-shape-1 {
    width: 400px;
    height: 400px;
    background: var(--color-primary-500);
    top: -100px;
    left: -100px;
    animation-delay: 0s;
}

.floating-shape-2 {
    width: 300px;
    height: 300px;
    background: var(--color-accent-500);
    bottom: -50px;
    right: -50px;
    animation-delay: -10s;
}

.floating-shape-3 {
    width: 250px;
    height: 250px;
    background: var(--color-info-500);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -5s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    25% {
        transform: translate(20px, -30px) rotate(5deg);
    }
    50% {
        transform: translate(-10px, 20px) rotate(-5deg);
    }
    75% {
        transform: translate(15px, 10px) rotate(3deg);
    }
}

/* ============================================
 * LAYOUT CONTAINER
 * ============================================ */

.login-container {
    width: 100%;
    max-width: 1100px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
    position: relative;
    z-index: 1;
}

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

.login-card {
    background: var(--card-bg);
    padding: var(--space-10);
    border-radius: var(--card-radius);
    border: 1px solid var(--card-border);
    box-shadow: var(--card-shadow);
    animation: scaleIn var(--duration-slowest) var(--ease-spring);
    backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
}

.login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(
        90deg,
        transparent 0%,
        var(--color-primary-500) 50%,
        transparent 100%
    );
    opacity: 0.8;
}

/* ============================================
 * LOGO SECTION
 * ============================================ */

.logo-section {
    text-align: center;
    margin-bottom: var(--space-8);
}

.logo {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-2);
    letter-spacing: var(--letter-spacing-tight);
}

.logo span {
    background: linear-gradient(135deg, var(--color-primary-400) 0%, var(--color-accent-400) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* ============================================
 * ALERTS
 * ============================================ */

.alert {
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--font-size-sm);
    animation: slideDown var(--duration-slow) var(--ease-out);
    border: 1px solid;
}

.alert svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.alert.error {
    background: rgba(239, 68, 68, 0.1);
    border-color: var(--color-error-500);
    color: var(--color-error-300);
}

.alert.success {
    background: rgba(34, 197, 94, 0.1);
    border-color: var(--color-success-500);
    color: var(--color-success-300);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/* ============================================
 * FORM ELEMENTS
 * ============================================ */

.form-group {
    margin-bottom: var(--space-5);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.form-group {
    position: relative;
}

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

.form-group input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    padding-left: var(--space-11);
    border-radius: var(--radius-lg);
    border: 1px solid var(--input-border);
    background: var(--input-bg);
    color: var(--input-text);
    font-size: var(--font-size-base);
    font-family: inherit;
    transition: all var(--transition-fast);
    outline: none;
    height: var(--input-height-lg);
}

.form-group input:focus {
    border-color: var(--input-border-focus);
    box-shadow: var(--input-shadow-focus);
}

.form-group input:focus + .input-icon {
    color: var(--color-primary-500);
}

.form-group input::placeholder {
    color: var(--input-text-placeholder);
}

.form-group input:focus + .input-icon {
    color: var(--color-primary-500);
}

.input-icon {
    position: absolute;
    left: 14px;
    width: 16px;
    height: 16px;
    color: var(--color-text-tertiary);
    transition: color var(--transition-fast);
    pointer-events: none;
}

.input-wrapper:hover .input-icon {
    color: var(--color-text-secondary);
}

.input-icon.user-icon {
    left: 14px;
}

.input-icon.lock-icon {
    left: 14px;
}

/* Validation states */
.form-group.valid input {
    border-color: var(--color-success-500);
}

.form-group.valid .input-icon {
    color: var(--color-success-500);
}

.form-group.error input {
    border-color: var(--color-error-500);
}

.form-group.error .validation-icon {
    color: var(--color-error-500);
}

.validation-icon {
    position: absolute;
    right: var(--space-4);
    width: 18px;
    height: 18px;
    color: var(--color-text-tertiary);
    animation: fadeIn var(--duration-fast) var(--ease-out);
}

.validation-message {
    font-size: var(--font-size-xs);
    color: var(--color-error-400);
    margin-top: var(--space-2);
    display: flex;
    align-items: center;
    gap: var(--space-1);
    animation: slideDown var(--duration-fast) var(--ease-out);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ============================================
 * FORM OPTIONS
 * ============================================ */

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
    font-size: var(--font-size-sm);
}

/* Custom checkbox */
.checkbox-container {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
    color: var(--color-text-secondary);
    position: relative;
    padding-left: var(--space-7);
}

.checkbox-container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    position: absolute;
    left: 0;
    height: 20px;
    width: 20px;
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.checkbox-container:hover .checkmark {
    border-color: var(--color-primary-500);
}

.checkbox-container input:checked ~ .checkmark {
    background: var(--color-primary-500);
    border-color: var(--color-primary-500);
}

.checkmark::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 2px;
    width: 6px;
    height: 12px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg) scale(0);
    transition: transform var(--transition-fast) var(--ease-spring);
}

.checkbox-container input:checked ~ .checkmark::after {
    transform: rotate(45deg) scale(1);
}

.forgot-password {
    color: var(--color-primary-400);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
    position: relative;
}

.forgot-password::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-primary-400);
    transition: width var(--transition-normal);
}

.forgot-password:hover::after {
    width: 100%;
}

.forgot-password:hover {
    color: var(--color-primary-300);
}

/* ============================================
 * LOGIN BUTTON
 * ============================================ */

.login-btn {
    width: 100%;
    padding: var(--space-4) var(--space-6);
    background: linear-gradient(
        135deg,
        var(--color-primary-500) 0%,
        var(--color-primary-600) 100%
    );
    border: none;
    border-radius: var(--radius-lg);
    color: var(--btn-primary-text);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    position: relative;
    overflow: hidden;
}

.login-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.2) 50%,
        transparent 100%
    );
    transition: left 0.5s ease;
}

.login-btn:hover::before {
    left: 100%;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary-lg);
}

.login-btn:active {
    transform: translateY(0);
}

.login-btn svg {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-normal);
}

.login-btn:hover svg {
    transform: translateX(4px);
}

.login-btn.loading {
    opacity: 0.8;
    cursor: not-allowed;
    pointer-events: none;
}

.login-btn.loading svg {
    animation: spin 1s linear infinite;
}

/* ============================================
 * DEMO CREDENTIALS
 * ============================================ */

.divider {
    margin: var(--space-6) 0;
    text-align: center;
    position: relative;
}

.divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent 0%,
        var(--color-border-subtle) 50%,
        transparent 100%
    );
}

.divider span {
    position: relative;
    background: var(--card-bg);
    padding: 0 var(--space-4);
    color: var(--color-text-tertiary);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
}

.demo-credentials {
    background: var(--color-bg-base);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-default);
    animation: slideUp var(--duration-slow) var(--ease-out) 0.2s both;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.credentials-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
    color: var(--color-primary-400);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
}

.credentials-header svg {
    width: 16px;
    height: 16px;
}

.credential-item {
    padding: var(--space-2) 0;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-family: var(--font-family-mono);
}

.credential-item strong {
    color: var(--color-text-primary);
    margin-right: var(--space-2);
}

/* ============================================
 * FEATURES SECTION
 * ============================================ */

.features-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.feature-card {
    background: rgba(255, 255, 255, 0.02);
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    animation: slideInRight var(--duration-slower) var(--ease-out) both;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }

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

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(59, 130, 246, 0.5) 50%,
        transparent 100%
    );
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.feature-card:hover {
    transform: translateX(8px);
    border-color: rgba(59, 130, 246, 0.3);
    background: rgba(59, 130, 246, 0.05);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.1);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(
        135deg,
        var(--color-primary-500) 0%,
        var(--color-accent-500) 100%
    );
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-4);
    transition: transform var(--transition-normal);
    box-shadow: var(--shadow-primary-sm);
}

.feature-card:hover .feature-icon {
    transform: scale(1.05);
    box-shadow: var(--shadow-primary-md);
}

.feature-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.feature-card h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-2);
    color: var(--color-text-primary);
}

.feature-card p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
}

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

/* Mobile - below 768px */
@media (max-width: 768px) {
    body {
        padding: var(--space-4);
        padding-top: calc(var(--space-4) + var(--safe-area-top));
        padding-bottom: calc(var(--space-4) + var(--safe-area-bottom));
        align-items: flex-start;
        min-height: 100vh;
        min-height: 100dvh;
    }

    .login-container {
        grid-template-columns: 1fr;
        gap: var(--space-8);
        max-width: 480px;
        padding-top: var(--space-8);
    }

    .features-section {
        display: none;
    }

    .floating-shape-3 {
        display: none;
    }

    .login-card {
        padding: var(--space-6);
    }

    .logo {
        font-size: var(--font-size-2xl);
    }

    .logo-section {
        margin-bottom: var(--space-6);
    }

    /* Touch targets */
    .login-btn,
    input[type="checkbox"] + .checkmark {
        min-height: 44px;
        min-width: 44px;
    }

    .checkbox-container {
        padding-left: var(--space-8);
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    .forgot-password {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
    }
}

/* Small mobile - below 480px */
@media (max-width: 480px) {
    body {
        padding: var(--space-3);
    }

    .login-card {
        padding: var(--space-5);
        border-radius: var(--radius-lg);
    }

    .logo {
        font-size: var(--font-size-xl);
    }

    .tagline {
        font-size: var(--font-size-xs);
    }

    .form-group {
        margin-bottom: var(--space-4);
    }

    .form-group input {
        height: 48px;
        padding: var(--space-3) var(--space-4);
        padding-left: var(--space-10);
        font-size: 16px; /* Prevents zoom on iOS */
    }

    .input-icon {
        left: var(--space-3);
    }

    .form-options {
        flex-direction: column;
        gap: var(--space-4);
        align-items: flex-start;
    }

    .forgot-password {
        margin-left: 0;
    }

    .login-btn {
        padding: var(--space-4);
        font-size: var(--font-size-base);
    }

    .demo-credentials {
        padding: var(--space-3);
    }

    .credentials-header {
        font-size: var(--font-size-xs);
    }

    .credential-item {
        font-size: var(--font-size-xs);
        padding: var(--space-1-5) 0;
    }

    .floating-shape-1,
    .floating-shape-2 {
        width: 200px;
        height: 200px;
    }

    /* Alert messages */
    .alert {
        padding: var(--space-3);
        font-size: var(--font-size-xs);
    }

    .alert svg {
        width: 18px;
        height: 18px;
    }
}

/* Landscape mobile */
@media (max-width: 768px) and (orientation: landscape) {
    body {
        align-items: center;
    }

    .login-container {
        padding-top: var(--space-4);
    }
}

/* Prefers reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}