/**
 * ==========================================================================
 * LOGIN PAGE - STYLESHEET
 * Mendukung: Theme Light (Default) & Theme Dark (Toggleable)
 * ==========================================================================
 */

:root,
[data-theme="light"] {
    --bg-body-grad: radial-gradient(circle at 50% 20%, #eff6ff 0%, #f8fafc 70%);
    --bg-card: #ffffff;
    --border-card: #e2e8f0;
    --card-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.08), 0 0 0 1px rgba(15, 23, 42, 0.04);
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-glow: rgba(37, 99, 235, 0.2);
    --text-main: #0f172a;
    --text-muted: #475569;
    --text-label: #334155;
    --input-bg: #ffffff;
    --input-border: #cbd5e1;
    --input-focus-bg: #ffffff;
    --input-text: #0f172a;
    --danger: #dc2626;
    --danger-bg: #fef2f2;
    --danger-border: #fecaca;
    --danger-text: #b91c1c;
    --success: #059669;
    --success-bg: #ecfdf5;
    --success-border: #a7f3d0;
    --success-text: #047857;
    --title-grad: linear-gradient(135deg, #0f172a 40%, #334155 100%);
    --blob-1-bg: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
    --blob-2-bg: radial-gradient(circle, rgba(16, 185, 129, 0.08) 0%, transparent 70%);
    --footer-color: #64748b;
    --btn-theme-bg: #ffffff;
    --btn-theme-border: #cbd5e1;
    --btn-theme-color: #334155;
}

[data-theme="dark"] {
    --bg-body-grad: radial-gradient(circle at 50% 20%, #172554 0%, #080d1a 65%);
    --bg-card: rgba(17, 24, 39, 0.75);
    --border-card: rgba(55, 65, 81, 0.6);
    --card-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.65), 0 0 0 1px rgba(255, 255, 255, 0.04);
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --primary-glow: rgba(59, 130, 246, 0.35);
    --text-main: #f9fafb;
    --text-muted: #94a3b8;
    --text-label: #e2e8f0;
    --input-bg: rgba(15, 23, 42, 0.7);
    --input-border: rgba(71, 85, 105, 0.5);
    --input-focus-bg: rgba(15, 23, 42, 0.95);
    --input-text: #f8fafc;
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.12);
    --danger-border: rgba(239, 68, 68, 0.35);
    --danger-text: #fca5a5;
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.12);
    --success-border: rgba(16, 185, 129, 0.35);
    --success-text: #6ee7b7;
    --title-grad: linear-gradient(135deg, #ffffff 40%, #cbd5e1 100%);
    --blob-1-bg: radial-gradient(circle, rgba(37, 99, 235, 0.22) 0%, transparent 70%);
    --blob-2-bg: radial-gradient(circle, rgba(16, 185, 129, 0.15) 0%, transparent 70%);
    --footer-color: #64748b;
    --btn-theme-bg: rgba(31, 41, 55, 0.7);
    --btn-theme-border: rgba(75, 85, 99, 0.6);
    --btn-theme-color: #cbd5e1;
}

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

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background: var(--bg-body-grad);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    position: relative;
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

/* Ambient glow spots */
.ambient-blob {
    position: absolute;
    width: 450px;
    height: 450px;
    border-radius: 50%;
    filter: blur(50px);
    z-index: 0;
    pointer-events: none;
}

.blob-1 {
    top: -100px;
    left: -100px;
    background: var(--blob-1-bg);
}

.blob-2 {
    bottom: -120px;
    right: -100px;
    background: var(--blob-2-bg);
}

/* Top Navigation & Theme Switcher on Login Page */
.login-top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    margin-bottom: 1.5rem;
    gap: 1rem;
}

.btn-back-nav {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.95rem;
    border-radius: 10px;
    background: var(--btn-theme-bg);
    border: 1px solid var(--btn-theme-border);
    color: var(--btn-theme-color);
    font-size: 0.82rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

.btn-back-nav svg {
    width: 16px;
    height: 16px;
    transition: transform 0.2s ease;
}

.btn-back-nav:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
}

.btn-back-nav:hover svg {
    transform: translateX(-3px);
}

.btn-theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.5rem 0.95rem;
    border-radius: 10px;
    background: var(--btn-theme-bg);
    border: 1px solid var(--btn-theme-border);
    color: var(--btn-theme-color);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

.btn-theme-toggle:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
}

.login-wrapper {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 460px;
}

.brand-header {
    text-align: center;
    margin-bottom: 2rem;
}

.brand-logo-container {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.85rem;
    position: relative;
}

.brand-unsoed-logo {
    width: 84px;
    height: 84px;
    object-fit: contain;
    filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.15));
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.brand-unsoed-logo:hover {
    transform: scale(1.06) rotate(-2deg);
}

.brand-institution {
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 0.35rem;
}

.brand-logo-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 58px;
    height: 58px;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    border-radius: 16px;
    margin-bottom: 1rem;
    box-shadow: 0 10px 25px -5px rgba(37, 99, 235, 0.4), inset 0 1px 1px rgba(255, 255, 255, 0.3);
}

.brand-logo-badge svg {
    width: 30px;
    height: 30px;
    fill: #ffffff;
}

h1.brand-title {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    background: var(--title-grad);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.35rem;
}

p.brand-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.login-card {
    background: var(--bg-card);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid var(--border-card);
    border-radius: 20px;
    padding: 2.25rem;
    box-shadow: var(--card-shadow);
    position: relative;
    transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.alert {
    padding: 0.85rem 1rem;
    border-radius: 10px;
    font-size: 0.85rem;
    line-height: 1.4;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
}

.alert-danger {
    background: var(--danger-bg);
    border: 1px solid var(--danger-border);
    color: var(--danger-text);
}

.alert-success {
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    color: var(--success-text);
}

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

label {
    display: block;
    font-size: 0.82rem;
    font-weight: 700;
    margin-bottom: 0.45rem;
    color: var(--text-label);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

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

.input-icon {
    position: absolute;
    left: 1rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    pointer-events: none;
}

.input-icon svg {
    width: 18px;
    height: 18px;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 12px;
    padding: 0.85rem 2.75rem 0.85rem 2.75rem;
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--input-text);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

input[type="text"]:focus,
input[type="password"]:focus {
    background: var(--input-focus-bg);
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-glow);
}

.toggle-password {
    position: absolute;
    right: 0.9rem;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    display: flex;
    align-items: center;
    transition: color 0.2s;
}

.toggle-password:hover {
    color: var(--text-main);
}

.toggle-password svg {
    width: 18px;
    height: 18px;
}

.btn-submit {
    width: 100%;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    border: none;
    border-radius: 12px;
    padding: 0.9rem 1.25rem;
    font-size: 0.95rem;
    font-weight: 700;
    color: #ffffff;
    cursor: pointer;
    box-shadow: 0 8px 20px -4px rgba(37, 99, 235, 0.4);
    transition: transform 0.15s ease, box-shadow 0.15s ease, filter 0.15s ease;
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-submit:hover {
    filter: brightness(1.1);
    box-shadow: 0 10px 25px -4px rgba(37, 99, 235, 0.5);
    transform: translateY(-1px);
}

.btn-submit:active {
    transform: translateY(1px);
}

.login-card-divider {
    display: flex;
    align-items: center;
    margin: 1.25rem 0 1rem 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.login-card-divider span {
    padding: 0 0.75rem;
}

.btn-secondary-dashboard {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.82rem 1rem;
    border-radius: 12px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--text-label);
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
}

.btn-secondary-dashboard:hover {
    background: var(--btn-theme-bg);
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.12);
}

.btn-secondary-dashboard svg {
    color: var(--primary);
}

footer {
    text-align: center;
    margin-top: 2rem;
    font-size: 0.8rem;
    color: var(--footer-color);
}

footer a {
    color: var(--primary);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}