/* ===========================
   LOGIN PAGE CSS
   =========================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ---- Theme variables ---- */
:root {
    --login-bg-from: #0f172a;
    --login-bg-to:   #0f2744;
    --login-card-bg: rgba(255,255,255,0.05);
    --login-card-border: rgba(255,255,255,0.12);
    --login-text:    #fff;
    --login-muted:   rgba(255,255,255,0.5);
    --login-label:   rgba(255,255,255,0.7);
    --login-input-bg:     rgba(255,255,255,0.07);
    --login-input-border: rgba(255,255,255,0.12);
    --login-input-text:   #fff;
    --login-input-ph:     rgba(255,255,255,0.25);
    --login-icon-color:   rgba(255,255,255,0.35);
    --login-icon-hover:   rgba(255,255,255,0.7);
    --login-footer:  rgba(255,255,255,0.25);
}

[data-theme="light"] {
    --login-bg-from: #dbeafe;
    --login-bg-to:   #e0f2fe;
    --login-card-bg: rgba(255,255,255,0.92);
    --login-card-border: rgba(59,130,246,0.15);
    --login-text:    #0f172a;
    --login-muted:   #64748b;
    --login-label:   #475569;
    --login-input-bg:     #f8fafc;
    --login-input-border: #e2e8f0;
    --login-input-text:   #0f172a;
    --login-input-ph:     #94a3b8;
    --login-icon-color:   #94a3b8;
    --login-icon-hover:   #475569;
    --login-footer:  #94a3b8;
}

/* ---- Theme toggle button ---- */
.btn-theme-login {
    position: absolute;
    top: 16px; right: 16px;
    width: 36px; height: 36px;
    border-radius: 9px;
    border: 1px solid var(--login-card-border);
    background: var(--login-input-bg);
    color: var(--login-muted);
    font-size: 1rem;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}
.btn-theme-login:hover {
    border-color: rgba(59,130,246,0.35);
    color: var(--login-text);
}

body {
    font-family: 'Inter', sans-serif;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--login-bg-from) 0%, #1e3a5f 50%, var(--login-bg-to) 100%);
    position: relative;
    overflow: hidden;
    transition: background 0.3s;
}

body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at center, rgba(59,130,246,0.08) 0%, transparent 70%);
    animation: pulse 8s ease-in-out infinite;
}

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

.bg-overlay {
    position: fixed; inset: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(59,130,246,0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(99,102,241,0.1) 0%, transparent 50%);
}

.login-wrapper {
    position: relative;
    z-index: 10;
    width: 100%;
    max-width: 420px;
    padding: 20px;
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.login-card {
    background: var(--login-card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--login-card-border);
    border-radius: 20px;
    padding: 40px 36px;
    box-shadow: 0 25px 60px rgba(0,0,0,0.18), inset 0 1px 0 rgba(255,255,255,0.1);
    position: relative;
}

/* Header */
.login-header {
    text-align: center;
    margin-bottom: 32px;
}

a.logo-circle {
    text-decoration: none;
    color: inherit;
}
.logo-circle {
    width: 84px; height: 84px;
    background: var(--login-card-bg);
    border: 1px solid var(--login-card-border);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 16px;
    box-shadow: 0 8px 28px rgba(0,0,0,0.12);
    padding: 8px;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
a.logo-circle:hover {
    transform: scale(1.02);
    box-shadow: 0 10px 32px rgba(0,0,0,0.16);
}
.logo-circle img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.login-header h1 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--login-text);
    letter-spacing: -0.3px;
}

.login-header p {
    font-size: 0.85rem;
    color: var(--login-muted);
    margin-top: 4px;
}

/* Alert */
.alert-error {
    display: flex; align-items: center; gap: 8px;
    background: rgba(239,68,68,0.15);
    border: 1px solid rgba(239,68,68,0.3);
    color: #fca5a5;
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 0.875rem;
    margin-bottom: 20px;
}

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

.form-group label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--login-label);
    margin-bottom: 8px;
    letter-spacing: 0.3px;
    text-transform: uppercase;
}

.input-wrap {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 14px; top: 50%;
    transform: translateY(-50%);
    color: var(--login-icon-color);
    pointer-events: none;
}

.input-wrap input {
    width: 100%;
    padding: 13px 48px;
    background: var(--login-input-bg);
    border: 1px solid var(--login-input-border);
    border-radius: 10px;
    color: var(--login-input-text);
    font-size: 0.95rem;
    font-family: 'Inter', sans-serif;
    outline: none;
    transition: all 0.2s;
}

.input-wrap input::placeholder { color: var(--login-input-ph); }

.input-wrap input:focus {
    border-color: rgba(59,130,246,0.6);
    background: var(--login-input-bg);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}

.toggle-pw {
    position: absolute;
    right: 12px; top: 50%;
    transform: translateY(-50%);
    background: none; border: none;
    color: var(--login-icon-color);
    cursor: pointer; padding: 4px;
    transition: color 0.2s;
}
.toggle-pw:hover { color: var(--login-icon-hover); }

/* Button */
.btn-login {
    width: 100%;
    display: flex; align-items: center; justify-content: center; gap: 8px;
    padding: 14px;
    background: linear-gradient(135deg, #3b82f6, #6366f1);
    border: none; border-radius: 10px;
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    margin-top: 8px;
    transition: all 0.2s;
    box-shadow: 0 4px 20px rgba(59,130,246,0.35);
}

.btn-login:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 28px rgba(59,130,246,0.5);
}

.btn-login:disabled {
    opacity: 0.7; cursor: not-allowed; transform: none;
}

/* Footer */
.login-footer {
    text-align: center;
    margin-top: 28px;
}

.login-footer p {
    font-size: 0.78rem;
    color: var(--login-footer);
}