/**
 * Login Page Styles - Polindo AI Admin Panel
 * 
 * Gaya modern seperti Tailwind CSS tapi menggunakan CSS biasa.
 * FIXED: Tidak ada scroll di desktop, pas di viewport.
 */

/* CSS Variables */
:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --success: #16a34a;
    --success-light: #f0fdf4;
    --danger: #dc2626;
    --danger-light: #fef2f2;
    --warning: #f59e0b;
    --warning-light: #fffbeb;
    --text: #202123;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --bg: #f9fafb;
    --surface: #ffffff;
    --border: #e5e7eb;
    --border-focus: #2563eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-md: 0.625rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.25rem;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base - NO SCROLL */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html,
body {
    height: 100%;
    width: 100%;
    overflow: hidden; /* 🔑 KUNCI: Mencegah scroll */
}

html {
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0; /* 🔑 Hilangkan padding body */
}

/* Container - Pas di viewport */
.login-container {
    width: 100%;
    max-width: 26rem;
    max-height: 100vh; /* 🔑 Batas tinggi maksimal viewport */
    padding: 1rem; /* 🔑 Padding di container, bukan body */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    animation: fadeInUp 0.5s ease-out;
}

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

/* Card - Flexible height */
.login-card {
    width: 100%;
    background: var(--surface);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    transition: var(--transition);
    flex-shrink: 1; /* 🔑 Boleh menyusut jika ruang sempit */
}

.login-card:hover {
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

/* Header - Compact padding */
.login-header {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: white;
    padding: 2rem 1.875rem; /* 🔑 Diperkecil dari 2.5rem */
    text-align: center;
    position: relative;
    overflow: hidden;
}

.login-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.login-logo {
    width: 3.75rem; /* 🔑 Diperkecil dari 4.375rem */
    height: 3.75rem;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 1.75rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    position: relative;
    z-index: 1;
    transition: var(--transition);
}

.login-logo:hover {
    transform: scale(1.05) rotate(5deg);
    background: rgba(255, 255, 255, 0.3);
}

.login-header h1 {
    margin: 0 0 0.375rem 0;
    font-size: 1.375rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    position: relative;
    z-index: 1;
}

.login-header p {
    margin: 0;
    font-size: 0.8125rem;
    opacity: 0.9;
    position: relative;
    z-index: 1;
}

/* Body - Compact padding */
.login-body {
    padding: 1.75rem 1.875rem; /* 🔑 Diperkecil dari 2.5rem */
}

/* Form */
.login-form {
    margin-top: 0;
}

.form-group {
    margin-bottom: 1rem; /* 🔑 Diperkecil dari 1.25rem */
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 0.375rem;
    color: var(--text);
}

.form-group label i {
    color: var(--text-muted);
    font-size: 0.8125rem;
}

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

.input-wrapper i {
    position: absolute;
    left: 0.875rem;
    color: var(--text-muted);
    font-size: 0.875rem;
    transition: var(--transition);
    pointer-events: none;
    z-index: 1;
}

.input-wrapper input {
    width: 100%;
    padding: 0.6875rem 0.875rem 0.6875rem 2.625rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-family: inherit;
    background: var(--surface);
    color: var(--text);
    transition: var(--transition);
}

.input-wrapper input::placeholder {
    color: var(--text-muted);
}

.input-wrapper input:hover {
    border-color: #d1d5db;
}

.input-wrapper input:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

/* Button */
.btn-login {
    width: 100%;
    padding: 0.75rem; /* 🔑 Diperkecil dari 0.875rem */
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

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

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

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(37, 99, 235, 0.3);
}

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

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

/* Footer */
.login-footer {
    text-align: center;
    margin-top: 1.25rem; /* 🔑 Diperkecil dari 1.5rem */
    padding-top: 1.25rem;
    border-top: 1px solid var(--border);
}

.login-footer a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.8125rem;
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    transition: var(--transition);
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius);
}

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

/* Info Box - Compact */
.info-box {
    padding: 0.625rem 1rem; /* 🔑 Diperkecil dari 1rem */
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    color: white;
    font-size: 0.6875rem;
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    flex-shrink: 0; /* 🔑 Tidak boleh menyusut */
}

.info-box i {
    font-size: 0.8125rem;
}

/* Alerts - Compact */
.alert {
    padding: 0.625rem 0.875rem; /* 🔑 Diperkecil dari 0.875rem 1rem */
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-size: 0.8125rem;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    border: 1px solid;
    animation: slideDown 0.3s ease-out;
}

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

.alert i {
    margin-top: 0.125rem;
    flex-shrink: 0;
}

.alert-error {
    background: var(--danger-light);
    color: #991b1b;
    border-color: #fecaca;
    animation: slideDown 0.3s ease-out, shake 0.4s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.alert-warning {
    background: var(--warning-light);
    color: #92400e;
    border-color: #fde68a;
}

.alert-success {
    background: var(--success-light);
    color: #166534;
    border-color: #bbf7d0;
}

/* ========================================
   RESPONSIVE - Mobile & Small Screens
   ======================================== */

/* Tablet & Mobile Landscape */
@media (max-width: 768px) {
    .login-container {
        padding: 0.75rem;
    }
    
    .login-header {
        padding: 1.75rem 1.5rem;
    }
    
    .login-body {
        padding: 1.5rem;
    }
}

/* Mobile */
@media (max-width: 640px) {
    .login-container {
        padding: 0.75rem;
        gap: 0.75rem;
    }
    
    .login-header {
        padding: 1.5rem 1.25rem;
    }
    
    .login-body {
        padding: 1.25rem;
    }
    
    .login-logo {
        width: 3.25rem;
        height: 3.25rem;
        font-size: 1.5rem;
        margin-bottom: 0.75rem;
    }
    
    .login-header h1 {
        font-size: 1.25rem;
    }
    
    .login-header p {
        font-size: 0.75rem;
    }
    
    .form-group {
        margin-bottom: 0.875rem;
    }
    
    .form-group label {
        font-size: 0.75rem;
    }
    
    .input-wrapper input {
        padding: 0.625rem 0.75rem 0.625rem 2.375rem;
        font-size: 16px; /* Mencegah auto-zoom di iOS */
    }
    
    .btn-login {
        padding: 0.6875rem;
        font-size: 0.8125rem;
    }
    
    .login-footer {
        margin-top: 1rem;
        padding-top: 1rem;
    }
    
    .info-box {
        padding: 0.5rem 0.875rem;
        font-size: 0.625rem;
    }
}

/* Small Mobile - BOLEH SCROLL jika layar sangat kecil */
@media (max-height: 600px) {
    html,
    body {
        overflow-y: auto; /* 🔑 Izinkan scroll vertikal di layar sangat pendek */
        overflow-x: hidden;
    }
    
    .login-container {
        max-height: none;
        padding: 1rem 0.75rem;
        justify-content: flex-start;
        padding-top: 2rem;
        padding-bottom: 2rem;
    }
}

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

/* Focus Visible untuk Accessibility */
.btn-login:focus-visible,
.input-wrapper input:focus-visible,
.login-footer a:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Loading State */
.btn-login.loading {
    pointer-events: none;
    opacity: 0.7;
}

.btn-login.loading::after {
    content: '';
    width: 1rem;
    height: 1rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin-left: 0.5rem;
}

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