:root {
    --primary-900: #041C32;
    --primary-800: #04293A;
    --primary-700: #064663;
    --primary-600: #0B6E8A;
    --primary-500: #0A8BA8;
    --primary-400: #14A8C8;
    --primary-300: #5CC8DB;
    --primary-200: #A8E1ED;
    --primary-100: #D6F1F7;
    --accent: #ECB365;
    --accent-dark: #C9943A;
    --success: #00C853;
    --success-bg: #E8F5E9;
    --warning: #FF8F00;
    --warning-bg: #FFF8E1;
    --error: #D32F2F;
    --error-bg: #FFEBEE;
    --bg-body: #EDF2F7;
    --bg-card: rgba(255,255,255,0.88);
    --bg-input: #F7FAFC;
    --border: #D2D8E0;
    --text-dark: #1A202C;
    --text-mid: #4A5568;
    --text-muted: #718096;
    --text-light: #A0AEC0;
    --shadow-sm: 0 1px 3px rgba(4,28,50,0.06);
    --shadow-md: 0 4px 16px rgba(4,28,50,0.08);
    --shadow-lg: 0 8px 32px rgba(4,28,50,0.12);
    --shadow-xl: 0 16px 48px rgba(4,28,50,0.16);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}
*,*::before,*::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
    font-family: var(--font-main);
    background: var(--bg-body);
    color: var(--text-dark);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -2;
    background: linear-gradient(135deg, var(--primary-900) 0%, var(--primary-800) 40%, var(--primary-700) 100%);
}
body::after {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    background-image:
        radial-gradient(circle at 20% 80%, rgba(10,139,168,0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(236,179,101,0.08) 0%, transparent 50%);
    background-size: 100% 100%;
}
.bg-grid {
    position: fixed; inset: 0; z-index: -1;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
}

/* Nav */
.top-nav {
    background: rgba(4,28,50,0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    padding: 0 1.5rem;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 1000;
}
.nav-brand { display:flex; align-items:center; gap:12px; text-decoration:none; }
.nav-brand-icon {
    width:36px; height:36px;
    background: linear-gradient(135deg, var(--primary-500), var(--accent));
    border-radius: var(--radius-sm);
    display:flex; align-items:center; justify-content:center;
    color:#fff; font-size:18px; font-weight:800;
    box-shadow: 0 2px 8px rgba(10,139,168,0.3);
}
.nav-brand-text { color:#fff; font-size:15px; font-weight:600; letter-spacing:0.3px; line-height:1.2; }
.nav-brand-sub { color:var(--text-light); font-size:11px; font-weight:400; letter-spacing:0.5px; text-transform:uppercase; }
.nav-right { display:flex; align-items:center; gap:16px; }
.nav-status { display:flex; align-items:center; gap:6px; color:var(--text-light); font-size:12px; }
.nav-status-dot {
    width:7px; height:7px; background:var(--success); border-radius:50%;
    animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
    0%,100% { opacity:1; transform:scale(1); }
    50% { opacity:0.5; transform:scale(0.8); }
}

/* Main */
.main-container {
    min-height: calc(100vh - 60px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}
.registration-wrapper {
    display: grid;
    grid-template-columns: 340px 1fr;
    max-width: 960px;
    width: 100%;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

/* Brand Panel */
.brand-panel {
    background: linear-gradient(160deg, var(--primary-900) 0%, var(--primary-700) 50%, var(--primary-600) 100%);
    padding: 2.5rem 2rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
}
.brand-panel::before {
    content:''; position:absolute; top:-50%; right:-50%; width:200%; height:200%;
    background: radial-gradient(circle, rgba(255,255,255,0.04) 0%, transparent 60%);
    pointer-events:none;
}
.brand-panel::after {
    content:''; position:absolute; bottom:-30%; left:-30%; width:150%; height:150%;
    background: radial-gradient(circle, rgba(236,179,101,0.06) 0%, transparent 50%);
    pointer-events:none;
}
.brand-header { position:relative; z-index:1; }
.brand-logo {
    width:52px; height:52px;
    background: linear-gradient(135deg, var(--primary-500), var(--accent));
    border-radius: var(--radius-md);
    display:flex; align-items:center; justify-content:center;
    color:#fff; font-size:24px; font-weight:800;
    margin-bottom:1.5rem;
    box-shadow: 0 4px 16px rgba(10,139,168,0.4);
}
.brand-title { color:#fff; font-size:22px; font-weight:700; line-height:1.3; margin-bottom:0.75rem; }
.brand-desc { color:rgba(255,255,255,0.6); font-size:13px; line-height:1.6; }
.brand-features { position:relative; z-index:1; list-style:none; margin-top:2rem; }
.brand-features li {
    display:flex; align-items:center; gap:10px;
    color:rgba(255,255,255,0.75); font-size:13px;
    padding:8px 0; border-bottom:1px solid rgba(255,255,255,0.06);
}
.brand-features li:last-child { border-bottom:none; }
.brand-features li i { color:var(--accent); font-size:14px; width:20px; text-align:center; }
.brand-footer { position:relative; z-index:1; color:rgba(255,255,255,0.35); font-size:11px; margin-top:2rem; }

/* Form Panel */
.form-panel {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 2rem 2.5rem;
    position: relative;
    overflow-y: auto;
    max-height: calc(100vh - 60px);
}
.form-panel::-webkit-scrollbar { width:4px; }
.form-panel::-webkit-scrollbar-thumb { background:var(--border); border-radius:4px; }

/* Steps */
.step-progress { display:flex; align-items:center; justify-content:center; margin-bottom:2rem; padding:0 1rem; }
.step-item { display:flex; align-items:center; gap:0; }
.step-circle {
    width:32px; height:32px; border-radius:50%;
    display:flex; align-items:center; justify-content:center;
    font-size:13px; font-weight:700;
    border:2px solid var(--border); color:var(--text-light);
    background:#fff; transition:var(--transition); flex-shrink:0;
}
.step-label { font-size:11px; color:var(--text-light); font-weight:500; margin-left:6px; white-space:nowrap; transition:var(--transition); }
.step-line { width:40px; height:2px; background:var(--border); margin:0 6px; transition:var(--transition); flex-shrink:0; }
.step-item.active .step-circle { border-color:var(--primary-600); background:var(--primary-600); color:#fff; box-shadow:0 0 0 4px rgba(11,110,138,0.15); }
.step-item.active .step-label { color:var(--primary-700); font-weight:600; }
.step-item.completed .step-circle { border-color:var(--success); background:var(--success); color:#fff; }
.step-item.completed .step-label { color:var(--success); font-weight:500; }
.step-line.completed { background:var(--success); }

/* Form Elements */
.form-section-title { font-size:15px; font-weight:700; color:var(--primary-800); margin-bottom:1rem; display:flex; align-items:center; gap:8px; }
.form-section-title i { color:var(--primary-500); font-size:16px; }
.form-section-divider { border:none; border-top:1px solid var(--border); margin:1.5rem 0; }
.field-group { margin-bottom:1rem; position:relative; }
.field-label { display:block; font-size:12px; font-weight:600; color:var(--text-mid); margin-bottom:5px; text-transform:uppercase; letter-spacing:0.5px; }
.field-label .required-star { color:var(--error); margin-left:2px; }
.field-input-group { position:relative; }
.field-input-icon { position:absolute; left:12px; top:50%; transform:translateY(-50%); color:var(--text-light); font-size:15px; z-index:2; transition:var(--transition); pointer-events:none; }
.form-control {
    border:1.5px solid var(--border); border-radius:var(--radius-sm);
    padding:10px 12px 10px 40px; font-size:14px; font-family:var(--font-main);
    color:var(--text-dark); background:var(--bg-input); transition:var(--transition); height:auto;
}
.form-control:focus { border-color:var(--primary-500); box-shadow:0 0 0 3px rgba(10,139,168,0.12); background:#fff; outline:none; }
.form-control:focus + .field-input-icon, .form-control:focus ~ .field-input-icon { color:var(--primary-500); }
.form-control.is-valid { border-color:var(--success); background:var(--success-bg); }
.form-control.is-valid + .field-input-icon, .form-control.is-valid ~ .field-input-icon { color:var(--success); }
.form-control.is-invalid { border-color:var(--error); background:var(--error-bg); }
.form-control.is-invalid + .field-input-icon, .form-control.is-invalid ~ .field-input-icon { color:var(--error); }
.form-control:disabled, .form-control[readonly] { background:#EDF2F7; color:var(--text-mid); cursor:not-allowed; opacity:0.85; }
.auto-field .form-control { padding-left:40px; padding-right:36px; }
.auto-badge {
    position:absolute; right:10px; top:50%; transform:translateY(-50%);
    font-size:9px; font-weight:700; text-transform:uppercase; letter-spacing:0.5px;
    color:var(--primary-500); background:rgba(10,139,168,0.08);
    padding:2px 6px; border-radius:3px; pointer-events:none; display:none;
}
.auto-field.populated .auto-badge { display:block; }
.field-feedback { font-size:12px; margin-top:4px; display:flex; align-items:center; gap:4px; min-height:18px; }
.field-feedback.valid { color:var(--success); }
.field-feedback.invalid { color:var(--error); }
.field-feedback.checking { color:var(--text-muted); }
.spinner-inline { width:14px; height:14px; border:2px solid var(--border); border-top-color:var(--primary-500); border-radius:50%; animation:spin 0.7s linear infinite; display:inline-block; vertical-align:middle; }
@keyframes spin { to { transform:rotate(360deg); } }

/* Password */
.password-strength { margin-top:8px; }
.strength-bar-track { height:4px; background:var(--border); border-radius:4px; overflow:hidden; margin-bottom:6px; }
.strength-bar-fill { height:100%; width:0%; border-radius:4px; transition:width 0.4s ease, background 0.4s ease; }
.strength-bar-fill.weak { width:33%; background:var(--error); }
.strength-bar-fill.medium { width:66%; background:var(--warning); }
.strength-bar-fill.strong { width:100%; background:var(--success); }
.strength-label { font-size:11px; font-weight:600; text-transform:uppercase; letter-spacing:0.5px; }
.strength-label.weak { color:var(--error); }
.strength-label.medium { color:var(--warning); }
.strength-label.strong { color:var(--success); }
.password-criteria { display:grid; grid-template-columns:1fr 1fr; gap:3px 12px; margin-top:8px; }
.criteria-item { font-size:11px; color:var(--text-light); display:flex; align-items:center; gap:5px; transition:var(--transition); }
.criteria-item i { font-size:12px; width:14px; text-align:center; }
.criteria-item.met { color:var(--success); }

/* Terms */
.terms-check {
    display:flex; align-items:flex-start; gap:10px;
    padding:1rem; background:rgba(10,139,168,0.04);
    border:1px solid rgba(10,139,168,0.12); border-radius:var(--radius-sm); margin-top:0.5rem;
}
.terms-check .form-check-input { margin-top:3px; width:18px; height:18px; border-color:var(--border); cursor:pointer; }
.terms-check .form-check-input:checked { background-color:var(--primary-600); border-color:var(--primary-600); }
.terms-check .form-check-label { font-size:13px; color:var(--text-mid); cursor:pointer; line-height:1.5; }
.terms-check .form-check-label a { color:var(--primary-600); text-decoration:none; font-weight:600; }
.terms-check .form-check-label a:hover { text-decoration:underline; }

/* Submit */
.btn-submit {
    width:100%; padding:12px; font-size:15px; font-weight:700; text-transform:uppercase; letter-spacing:1px;
    border:none; border-radius:var(--radius-sm);
    background:linear-gradient(135deg, var(--primary-700), var(--primary-500));
    color:#fff; cursor:pointer; transition:var(--transition);
    position:relative; overflow:hidden; margin-top:1.5rem;
    display:flex; align-items:center; justify-content:center; gap:8px;
}
.btn-submit:hover:not(:disabled) { background:linear-gradient(135deg, var(--primary-800), var(--primary-600)); box-shadow:0 4px 20px rgba(11,110,138,0.3); transform:translateY(-1px); }
.btn-submit:active:not(:disabled) { transform:translateY(0); }
.btn-submit:disabled { opacity:0.5; cursor:not-allowed; }
.btn-submit .spinner-border { width:18px; height:18px; border-width:2px; }

/* OTP Modal */
.otp-modal .modal-content { border:none; border-radius:var(--radius-lg); box-shadow:var(--shadow-xl); overflow:hidden; }
.otp-modal .modal-header { background:linear-gradient(135deg, var(--primary-800), var(--primary-600)); color:#fff; border:none; padding:1.25rem 1.5rem; }
.otp-modal .modal-header .btn-close { filter:brightness(0) invert(1); opacity:0.7; }
.otp-modal .modal-body { padding:2rem 1.5rem; }
.otp-icon-wrapper { width:64px; height:64px; border-radius:50%; background:rgba(10,139,168,0.08); display:flex; align-items:center; justify-content:center; margin:0 auto 1rem; }
.otp-icon-wrapper i { font-size:28px; color:var(--primary-600); }
.otp-title { text-align:center; font-size:18px; font-weight:700; color:var(--text-dark); margin-bottom:0.5rem; }
.otp-desc { text-align:center; font-size:13px; color:var(--text-muted); margin-bottom:1.5rem; line-height:1.5; }
.otp-input-wrapper { display:flex; gap:10px; justify-content:center; margin-bottom:1rem; }
.otp-digit-input { width:48px; height:56px; text-align:center; font-size:22px; font-weight:700; font-family:var(--font-mono); border:2px solid var(--border); border-radius:var(--radius-sm); background:var(--bg-input); color:var(--text-dark); transition:var(--transition); outline:none; }
.otp-digit-input:focus { border-color:var(--primary-500); box-shadow:0 0 0 3px rgba(10,139,168,0.12); background:#fff; }
.otp-digit-input.filled { border-color:var(--primary-400); }
.otp-feedback { text-align:center; font-size:12px; min-height:20px; margin-bottom:1rem; }
.otp-timer { text-align:center; font-size:13px; color:var(--text-muted); margin-bottom:1rem; }
.otp-timer span { font-weight:700; color:var(--primary-600); font-family:var(--font-mono); }
.btn-verify-otp {
    width:100%; padding:11px; font-size:14px; font-weight:700; text-transform:uppercase; letter-spacing:0.8px;
    border:none; border-radius:var(--radius-sm);
    background:linear-gradient(135deg, var(--primary-700), var(--primary-500));
    color:#fff; cursor:pointer; transition:var(--transition);
    display:flex; align-items:center; justify-content:center; gap:8px;
}
.btn-verify-otp:hover:not(:disabled) { background:linear-gradient(135deg, var(--primary-800), var(--primary-600)); box-shadow:0 4px 16px rgba(11,110,138,0.3); }
.btn-verify-otp:disabled { opacity:0.5; cursor:not-allowed; }
.btn-resend-otp {
    width:100%; padding:10px; font-size:13px; font-weight:600;
    border:1.5px solid var(--primary-500); border-radius:var(--radius-sm);
    background:transparent; color:var(--primary-600); cursor:pointer;
    transition:var(--transition); margin-top:8px;
    display:flex; align-items:center; justify-content:center; gap:6px;
}
.btn-resend-otp:hover:not(:disabled) { background:rgba(10,139,168,0.06); }
.btn-resend-otp:disabled { opacity:0.4; cursor:not-allowed; border-color:var(--border); color:var(--text-light); }

/* Success */
.success-modal .modal-content { border:none; border-radius:var(--radius-lg); box-shadow:var(--shadow-xl); text-align:center; padding:2.5rem 2rem; position:relative; overflow:hidden; }
.success-modal .modal-content::before { content:''; position:absolute; top:0; left:0; right:0; height:4px; background:linear-gradient(90deg, var(--success), var(--primary-500), var(--accent)); }
.success-checkmark { width:80px; height:80px; margin:0 auto 1.5rem; position:relative; }
.success-checkmark svg { width:80px; height:80px; }
.checkmark-circle { stroke:var(--success); stroke-width:3; fill:none; stroke-dasharray:240; stroke-dashoffset:240; animation:circle-draw 0.6s ease forwards; }
.checkmark-check { stroke:var(--success); stroke-width:3; fill:none; stroke-dasharray:50; stroke-dashoffset:50; stroke-linecap:round; stroke-linejoin:round; animation:check-draw 0.4s 0.5s ease forwards; }
@keyframes circle-draw { to { stroke-dashoffset:0; } }
@keyframes check-draw { to { stroke-dashoffset:0; } }
.success-title { font-size:20px; font-weight:700; color:var(--text-dark); margin-bottom:0.5rem; }
.success-message { font-size:14px; color:var(--text-muted); margin-bottom:0.5rem; line-height:1.5; }
.success-redirect { font-size:13px; color:var(--text-light); margin-top:1rem; }
.success-redirect span { font-weight:700; color:var(--primary-600); font-family:var(--font-mono); }

/* Toast */
.toast-container { position:fixed; top:76px; right:20px; z-index:9999; display:flex; flex-direction:column; gap:8px; }
.custom-toast {
    display:flex; align-items:center; gap:10px; padding:12px 16px; border-radius:var(--radius-sm);
    background:#fff; box-shadow:var(--shadow-lg); border-left:4px solid var(--border);
    min-width:300px; max-width:420px; animation:toast-in 0.35s ease forwards;
    font-size:13px; color:var(--text-dark);
}
.custom-toast.toast-success { border-left-color:var(--success); }
.custom-toast.toast-error { border-left-color:var(--error); }
.custom-toast.toast-warning { border-left-color:var(--warning); }
.custom-toast.toast-info { border-left-color:var(--primary-500); }
.custom-toast.toast-out { animation:toast-out 0.3s ease forwards; }
@keyframes toast-in { from { opacity:0; transform:translateX(40px); } to { opacity:1; transform:translateX(0); } }
@keyframes toast-out { from { opacity:1; transform:translateX(0); } to { opacity:0; transform:translateX(40px); } }
.custom-toast i { font-size:18px; flex-shrink:0; }
.custom-toast.toast-success i { color:var(--success); }
.custom-toast.toast-error i { color:var(--error); }
.custom-toast.toast-warning i { color:var(--warning); }
.custom-toast.toast-info i { color:var(--primary-500); }

/* Responsive */
@media (max-width: 991px) {
    .registration-wrapper { grid-template-columns:1fr; max-width:540px; }
    .brand-panel { padding:2rem 1.5rem; }
    .brand-features { display:none; }
    .form-panel { padding:1.5rem; }
}
@media (max-width: 575px) {
    .main-container { padding:1rem 0.5rem; }
    .top-nav { padding:0 1rem; }
    .nav-brand-text { font-size:13px; }
    .nav-brand-sub { display:none; }
    .brand-panel { padding:1.5rem 1.25rem; }
    .brand-title { font-size:18px; }
    .form-panel { padding:1.25rem; max-height:none; }
    .step-label { display:none; }
    .step-line { width:24px; }
    .step-circle { width:28px; height:28px; font-size:11px; }
    .form-control { padding:9px 10px 9px 36px; font-size:13px; }
    .field-input-icon { left:10px; font-size:14px; }
    .password-criteria { grid-template-columns:1fr; }
    .otp-digit-input { width:42px; height:50px; font-size:20px; }
    .custom-toast { min-width:260px; max-width:calc(100vw - 40px); }
    .toast-container { right:10px; left:10px; }
}
.fade-in { animation: fadeIn 0.4s ease forwards; }
@keyframes fadeIn { from { opacity:0; transform:translateY(8px); } to { opacity:1; transform:translateY(0); } }
.sr-only { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); border:0; }