/* ===== CSS VARIABLES ===== */
:root {
    --bg: #0a0e17;
    --surface: #111827;
    --text: #e2e8f0;
    --text-secondary: #94a3b8;
    --accent: #3b82f6;
    --accent-light: #60a5fa;
    --accent-glow: rgba(59,130,246,0.3);
    --border: #1e293b;
    --border-light: #334155;
    --error: #ef4444;
    --radius: 12px;
    --radius-lg: 16px;
    --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    --transition: 0.2s ease;
}
body.light-mode {
    --bg: #f8fafc;
    --surface: #ffffff;
    --text: #0f172a;
    --text-secondary: #475569;
    --border: #e2e8f0;
    --border-light: #cbd5e1;
}

/* ===== RESET ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-sans);background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh;overflow-x:hidden}

/* ===== HEADER ===== */
.site-header{position:fixed;top:12px;left:50%;transform:translateX(-50%);width:calc(100% - 24px);max-width:1100px;z-index:100;border-radius:var(--radius-lg);background:rgba(10,14,23,0.78);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid rgba(255,255,255,0.06);box-shadow:0 8px 32px rgba(0,0,0,0.3)}
body.light-mode .site-header{background:rgba(248,250,252,0.85);border-color:rgba(0,0,0,0.06)}
.header-inner{display:flex;justify-content:space-between;align-items:center;padding:0.5rem 1.2rem;gap:1rem}
.logo-link{display:flex;align-items:center;gap:0.5rem;text-decoration:none;color:var(--text);flex-shrink:0}
.logo-img{width:36px;height:36px;border-radius:8px;background:var(--surface)}
.logo-text{font-size:1rem;font-weight:700;color:var(--accent-light);white-space:nowrap}
.nav-links{display:flex;gap:0.3rem;align-items:center}
.nav-links a{color:var(--text-secondary);text-decoration:none;font-weight:500;padding:0.3rem 0.6rem;border-radius:8px;font-size:0.78rem;transition:var(--transition);display:flex;align-items:center;gap:0.3rem;white-space:nowrap}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,0.04)}
.nav-actions{display:flex;align-items:center;gap:0.5rem;flex-shrink:0}
.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.4rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}
.theme-toggle i {
    color: var(--text-secondary);
    font-size: 1.1rem;
}
.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.08);
}
.theme-toggle:hover i {
    color: var(--accent-light);
}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:0.4rem;padding:0.5rem 1.4rem;border-radius:var(--radius);font-weight:600;font-size:0.85rem;text-decoration:none;cursor:pointer;transition:var(--transition);border:2px solid transparent;white-space:nowrap;font-family:var(--font-sans)}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 4px 15px var(--accent-glow)}
.btn-primary:hover{background:var(--accent-light);transform:translateY(-1px)}
.btn-outline{border-color:var(--border-light);color:var(--text-secondary)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent);background:rgba(59,130,246,0.05)}
.btn-sm{padding:0.4rem 1rem;font-size:0.78rem}
.btn-lg{padding:0.85rem 2rem;font-size:0.95rem}
.btn-block{width:100%;justify-content:center}

/* ===== LOGIN SPLIT ===== */
.login-main{padding-top:5.5rem;min-height:100vh}
.login-split{display:flex;min-height:calc(100vh - 5.5rem)}

/* ===== LEFT: WELCOME PANEL ===== */
.login-welcome{
    display:none;
    flex:1;
    background:var(--surface);
    padding:3rem 3rem 1.5rem;
    flex-direction:column;
    justify-content:space-between;
    border-right:1px solid var(--border);
    position:relative;
    overflow:hidden;
}
.login-welcome::before{
    content:'';position:absolute;top:-100px;right:-100px;
    width:300px;height:300px;border-radius:50%;
    background:radial-gradient(circle,rgba(59,130,246,0.08) 0%,transparent 70%);
    pointer-events:none;
}
.welcome-content{position:relative;z-index:1}
.welcome-badge{
    display:inline-flex;align-items:center;gap:0.4rem;
    padding:0.3rem 0.9rem;background:rgba(59,130,246,0.1);
    border:1px solid rgba(59,130,246,0.2);border-radius:50px;
    font-size:0.78rem;color:var(--accent-light);margin-bottom:1.5rem;
}
.login-welcome h1{font-size:clamp(1.8rem,3.5vw,2.5rem);margin-bottom:1rem;line-height:1.2}
.highlight{color:var(--accent);position:relative}
.highlight::after{content:'';position:absolute;bottom:2px;left:0;width:100%;height:3px;background:var(--accent);border-radius:2px;opacity:0.5}
.welcome-lead{color:var(--text-secondary);font-size:0.95rem;max-width:420px;margin-bottom:2rem;line-height:1.6}

/* Stats */
.welcome-stats{display:flex;gap:2rem;margin-bottom:2rem;flex-wrap:wrap}
.w-stat{display:flex;flex-direction:column;gap:0.2rem}
.w-stat-num{font-size:1.8rem;font-weight:800;color:var(--accent-light)}
.w-stat-label{font-size:0.8rem;color:var(--text-secondary);max-width:180px;line-height:1.4}

/* Tips */
.welcome-tips{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:1.2rem 1.5rem}
.welcome-tips h4{font-size:0.85rem;margin-bottom:0.8rem;color:var(--text);display:flex;align-items:center;gap:0.5rem}
.welcome-tips h4 i{color:#fbbf24}
.welcome-tips ul{list-style:none;display:flex;flex-direction:column;gap:0.6rem}
.welcome-tips li{font-size:0.82rem;color:var(--text-secondary);display:flex;align-items:flex-start;gap:0.5rem;line-height:1.4}
.welcome-tips li i{color:var(--accent);margin-top:3px;flex-shrink:0}
.welcome-footer{font-size:0.75rem;color:var(--text-secondary);position:relative;z-index:1}

/* ===== RIGHT: FORM PANEL ===== */
.login-form-panel{flex:1;display:flex;align-items:center;justify-content:center;padding:2rem 2rem 3rem}
.form-container{width:100%;max-width:420px}
.form-header{margin-bottom:2rem}
.form-header h2{font-size:1.6rem;margin-bottom:0.3rem}
.form-header p{color:var(--text-secondary);font-size:0.9rem}

/* Social */
.social-login{display:flex;flex-direction:column;gap:0.7rem;margin-bottom:1.5rem}
.btn-social{justify-content:center;padding:0.7rem 1.5rem;font-weight:600;font-size:0.9rem;gap:0.7rem;width:100%}
.btn-google{background:#fff;color:#1f2937;border-color:#d1d5db}
.btn-google:hover{background:#f9fafb;border-color:#9ca3af}
.btn-facebook{background:#1877f2;color:#fff;border-color:#1877f2}
.btn-facebook:hover{background:#166fe5;border-color:#166fe5}

/* Divider */
.divider{display:flex;align-items:center;gap:1rem;margin:1.5rem 0}
.divider::before,.divider::after{content:'';flex:1;height:1px;background:var(--border)}
.divider span{font-size:0.78rem;color:var(--text-secondary);white-space:nowrap;text-transform:uppercase;letter-spacing:0.05em}

/* Form */
.form-group{margin-bottom:1.2rem}
.form-group label{display:block;font-size:0.85rem;font-weight:600;margin-bottom:0.4rem}
.input-wrapper{position:relative}
.input-icon{position:absolute;left:0.9rem;top:50%;transform:translateY(-50%);color:var(--text-secondary);font-size:0.9rem;pointer-events:none}
.form-input{width:100%;padding:0.75rem 0.9rem 0.75rem 2.6rem;background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius);color:var(--text);font-size:0.9rem;font-family:var(--font-sans);transition:var(--transition)}
.form-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(59,130,246,0.15)}
.form-input::placeholder{color:var(--text-secondary);opacity:0.6}
.form-error{display:block;font-size:0.75rem;color:var(--error);margin-top:0.3rem}
.non-field-error{background:rgba(239,68,68,0.1);border:1px solid rgba(239,68,68,0.3);padding:0.7rem 1rem;border-radius:var(--radius);margin-bottom:1rem}
.toggle-password{position:absolute;right:0.7rem;top:50%;transform:translateY(-50%);background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:0.3rem}

/* Options */
.form-options{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;flex-wrap:wrap;gap:0.5rem}
.checkbox-label{display:flex;align-items:center;gap:0.5rem;font-size:0.82rem;color:var(--text-secondary);cursor:pointer}
.checkbox-label input[type="checkbox"]{width:16px;height:16px;accent-color:var(--accent)}
.forgot-link{font-size:0.82rem;color:var(--accent-light);text-decoration:none;font-weight:500}
.forgot-link:hover{text-decoration:underline}
.form-footer{text-align:center;margin-top:1.5rem;font-size:0.85rem;color:var(--text-secondary)}
.form-footer a{color:var(--accent-light);text-decoration:none;font-weight:600}

/* ============================================================
   WHATSAPP PASSWORD-RESET FALLBACK
   Always-visible manual backup path for when outgoing email is
   blocked - see password_reset.html for the JS that builds the
   wa.me link and utility/config.py Static.password_reset_whatsapp_number()
   for the centralized phone number.
   ============================================================ */
.wa-fallback{margin-top:1.5rem;padding:1rem 1.1rem;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg)}
.wa-fallback-head{display:flex;align-items:center;gap:.5rem;font-weight:700;font-size:.9rem;color:#25D366;margin-bottom:.4rem}
.wa-fallback-head i{font-size:1.1rem}
.wa-fallback-copy{font-size:.78rem;color:var(--text-secondary);margin-bottom:.8rem;line-height:1.5}
.wa-fallback .btn-outline{border-color:#25D366;color:#25D366}
.wa-fallback .btn-outline:hover{background:rgba(37,211,102,0.1);border-color:#25D366;color:#25D366}

/* ===== RESPONSIVE ===== */
@media(max-width:639px){
    .nav-links{display:none}
    .logo-text{display:none}
    .login-form-panel{padding:1.5rem 1rem 2rem}
}
@media(min-width:768px){
    .login-welcome{display:flex}
    .login-form-panel{padding:3rem 3rem 4rem}
}
@media(min-width:1024px){
    .login-welcome{padding:3.5rem 4rem 2rem}
    .login-form-panel{padding:3rem 4rem 4rem}
}

.theme-toggle i { color: var(--text-secondary); }

.mini-spinner {
    display: none;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.2);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.btn-primary:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    transform: none;
}