:root {
    --primary: #1e40af;
    --primary-light: #3b82f6;
    --primary-dark: #1e3a8a;
    --secondary: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --light: #f8fafc;
    --dark: #1e293b;
    --border: #e2e8f0;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
}

[data-theme="dark"] {
    --bg-primary: #1e293b;
    --bg-secondary: #0f172a;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --light: #0f172a;
    --dark: #f1f5f9;
    --border: #334155;
    --secondary: #94a3b8;
}

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

body {
    font-family: 'Inter', sans-serif;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--border-color) 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    position: relative;
    color: var(--text-primary);
    transition: background 0.3s ease, color 0.3s ease;
}

[data-theme="dark"] body {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 50%, var(--primary) 100%);
    background-size: 200% 100%;
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% { background-position: 0% 0%; }
    50% { background-position: 100% 0%; }
}

.form-container {
    background: var(--bg-primary);
    border-radius: 20px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05),
                0 10px 15px -3px rgba(0, 0, 0, 0.08),
                0 20px 25px -5px rgba(0, 0, 0, 0.05);
    max-width: 560px;
    width: 100%;
    border: 1px solid var(--border-color);
    animation: fadeIn 0.6s ease-out;
    overflow: hidden;
    transition: background 0.3s ease, border-color 0.3s ease;
}

[data-theme="dark"] .form-container {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3),
                0 10px 15px -3px rgba(0, 0, 0, 0.4),
                0 20px 25px -5px rgba(0, 0, 0, 0.3);
}

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

.form-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    padding: 32px;
    text-align: center;
    color: white;
}

.form-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.form-header p {
    opacity: 0.9;
    font-size: 0.95rem;
}

.form-body {
    padding: 32px;
}

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

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.form-label .required {
    color: var(--danger);
}

.form-control {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.3s ease, color 0.3s ease;
    background: var(--bg-primary);
    color: var(--text-primary);
}

[data-theme="dark"] .form-control {
    background: #1e293b !important;
    color: #f1f5f9 !important;
}

[data-theme="dark"] input[type="date"].form-control,
[data-theme="dark"] input[type="tel"].form-control,
[data-theme="dark"] input[type="email"].form-control,
[data-theme="dark"] input[type="password"].form-control,
[data-theme="dark"] input[type="text"].form-control,
[data-theme="dark"] input[type="url"].form-control {
    background-color: #1e293b !important;
    color: #f1f5f9 !important;
}

[data-theme="dark"] input[type="date"].form-control::-webkit-calendar-picker-indicator {
    filter: invert(1);
    cursor: pointer;
}

[data-theme="dark"] input[type="date"].form-control::-webkit-calendar-picker-indicator:hover {
    opacity: 0.8;
}

[data-theme="dark"] .form-control::placeholder {
    color: #94a3b8;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

[data-theme="dark"] .form-control:focus {
    background-color: #1e293b !important;
    color: #f1f5f9 !important;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.form-control::placeholder {
    color: var(--text-secondary);
}

.form-control.error {
    border-color: var(--danger);
}

[data-theme="dark"] .form-control.error {
    background-color: #1e293b !important;
    color: #f1f5f9 !important;
    border-color: #ef4444;
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 16px 16px;
    padding-right: 44px;
    cursor: pointer;
}

[data-theme="dark"] select.form-control {
    background-color: #1e293b !important;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f1f5f9' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E") !important;
    background-repeat: no-repeat !important;
    background-position: right 16px center !important;
    background-size: 16px 16px !important;
    color: #f1f5f9 !important;
    border-color: #334155;
}

[data-theme="dark"] select.form-control:hover {
    background-color: #1e293b !important;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f1f5f9' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E") !important;
    background-repeat: no-repeat !important;
    background-position: right 16px center !important;
    background-size: 16px 16px !important;
}

[data-theme="dark"] select.form-control option {
    background-color: #1e293b !important;
    color: #f1f5f9 !important;
}

[data-theme="dark"] select.form-control:focus {
    background-color: #1e293b !important;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f1f5f9' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E") !important;
    background-repeat: no-repeat !important;
    background-position: right 16px center !important;
    background-size: 16px 16px !important;
    color: #f1f5f9 !important;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

[data-theme="dark"] textarea.form-control {
    background-color: #1e293b !important;
    color: #f1f5f9 !important;
}

[data-theme="dark"] textarea.form-control:focus {
    background-color: #1e293b !important;
    color: #f1f5f9 !important;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-error {
    color: var(--danger);
    font-size: 0.8rem;
    margin-top: 6px;
    display: none;
}

.form-error.show {
    display: block;
}

.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 16px 24px;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

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

.btn svg {
    width: 20px;
    height: 20px;
}

.form-footer {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    margin-top: 24px;
}

.form-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

[data-theme="dark"] .form-footer a {
    color: #60a5fa;
}

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

[data-theme="dark"] .form-footer a:hover {
    color: #93c5fd;
}

.alert {
    padding: 14px 16px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 0.9rem;
}

.alert-success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #86efac;
}

[data-theme="dark"] .alert-success {
    background: rgba(16, 185, 129, 0.2);
    color: #86efac;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.alert-danger {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

[data-theme="dark"] .alert-danger {
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border: 1px solid #fcd34d;
}

[data-theme="dark"] .alert-warning {
    background: rgba(245, 158, 11, 0.2);
    color: #fcd34d;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.email-verify-section {
    background: #f0f9ff;
    border: 1px solid #bae6fd;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    text-align: center;
}

[data-theme="dark"] .email-verify-section {
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.email-verify-section h3 {
    color: #0369a1;
    margin-bottom: 8px;
    font-size: 1rem;
}

[data-theme="dark"] .email-verify-section h3 {
    color: #93c5fd;
}

.email-verify-section p {
    color: #0c4a6e;
    font-size: 0.9rem;
    margin-bottom: 16px;
}

[data-theme="dark"] .email-verify-section p {
    color: #cbd5e1;
}

.verify-code-input {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-bottom: 16px;
}

.verify-code-input input {
    width: 48px;
    height: 56px;
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    transition: all 0.2s;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.verify-code-input input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

[data-theme="dark"] .verify-code-input input {
    background-color: #1e293b !important;
    color: #f1f5f9 !important;
    border-color: #334155;
}

[data-theme="dark"] .verify-code-input input:focus {
    background-color: #1e293b !important;
    color: #f1f5f9 !important;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}


.resend-link {
    color: var(--primary);
    text-decoration: none;
    font-size: 0.85rem;
    cursor: pointer;
}

.resend-link:hover {
    text-decoration: underline;
}

.resend-link.disabled {
    color: var(--text-secondary);
    pointer-events: none;
}

.password-strength {
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    margin-top: 8px;
    overflow: hidden;
}

.password-strength-bar {
    height: 100%;
    width: 0;
    transition: all 0.3s;
    border-radius: 2px;
}

.password-strength-bar.weak { width: 33%; background: var(--danger); }
.password-strength-bar.medium { width: 66%; background: var(--warning); }
.password-strength-bar.strong { width: 100%; background: var(--success); }

.loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

@media (max-width: 480px) {
    .form-container {
        margin: 10px;
    }
    
    .form-header {
        padding: 24px;
    }
    
    .form-body {
        padding: 24px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .verify-code-input input {
        width: 40px;
        height: 48px;
        font-size: 1.25rem;
    }
}

.step-indicator {
    display: flex;
    justify-content: center;
    gap: 8px;
    padding: 16px;
}

.step {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    transition: all 0.3s;
}

.step.active {
    background: white;
    transform: scale(1.2);
}

.step.completed {
    background: #86efac;
}

.dark-mode-toggle {
    position: fixed !important;
    top: 20px !important;
    right: 20px !important;
    background: #1e40af;
    border: 1px solid #1e3a8a;
    border-radius: 8px;
    padding: 8px;
    cursor: pointer;
    transition: background 0.2s, box-shadow 0.2s, transform 0.2s;
    display: flex !important;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    z-index: 1000 !important;
    visibility: visible !important;
    opacity: 1 !important;
    box-shadow: 0 2px 8px rgba(30, 64, 175, 0.3);
    margin: 0 !important;
    left: auto !important;
}

.dark-mode-toggle:hover {
    background: #1e3a8a;
    box-shadow: 0 4px 12px rgba(30, 64, 175, 0.4);
    transform: translateY(-1px);
}

.dark-mode-toggle svg {
    width: 20px;
    height: 20px;
    stroke: white;
    fill: none;
}

[data-theme="dark"] .dark-mode-toggle {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .dark-mode-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* Yasal Belge Checkbox Stilleri */
.legal-checkbox-label {
    transition: all 0.2s ease;
}

.legal-checkbox-label:hover {
    border-color: var(--primary-light) !important;
    background-color: rgba(59, 130, 246, 0.05);
}

.legal-checkbox-label input[type="checkbox"]:checked + div {
    color: var(--primary);
}

.legal-checkbox-label input[type="checkbox"]:checked ~ div {
    font-weight: 600;
}

.legal-checkbox-label:has(input[type="checkbox"]:checked) {
    border-color: var(--primary) !important;
    background-color: rgba(59, 130, 246, 0.05);
}

.legal-checkbox-label:has(input[type="checkbox"]:focus) {
    border-color: var(--primary-light) !important;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

[data-theme="dark"] .legal-checkbox-label:hover {
    background-color: rgba(59, 130, 246, 0.1);
}

[data-theme="dark"] .legal-checkbox-label:has(input[type="checkbox"]:checked) {
    background-color: rgba(59, 130, 246, 0.15);
}

.email-display {
    color: #1e293b;
    transition: color 0.3s ease;
}

[data-theme="dark"] .email-display {
    color: #f1f5f9;
}