*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
*, *:focus-visible { outline: 2px solid transparent; }
/* Accessibility: visible, high-contrast focus ring */
*:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: inherit;
}

:root {
            --accent: #06d7f5;
            --accent-2: #7c3aed;
            --accent-dim: rgba(6, 215, 245, 0.15);
            --accent-glow: rgba(6, 215, 245, 0.35);
            --bg: #060a14;
            --bg-card: rgba(13, 21, 35, 0.98);
            --border: rgba(148, 163, 184, 0.18);
            --text: #f1f5f9;
            --text-dim: var(--text-muted);
            --text-muted: #a0b3cc;
            --danger: #ef4444;
            --success: #22d3ee;
            --radius-lg: 20px;
            --radius-md: 11px;
            --radius-sm: 8px;
            /* Animasyonlar artık AKTİF (önceki turda !important'la kapatılmıştı) */
            --t-fast: 120ms;
            --t-med: 280ms;
            --ease: cubic-bezier(.4, 0, .2, 1);
            --ease-out: cubic-bezier(.22, 1, .36, 1);
        }

/* prefers-reduced-motion kullanıcılar icin hareketi kapat */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        transition-duration: 0.001ms !important;
    }
}

body {
            min-height: 100vh;
            background: var(--bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
            overflow: hidden;
            position: relative;
            line-height: 1.5;
        }

        /* Subtle animated background - darker, more vibrant */
        body::before {
            content: '';
            position: fixed;
            inset: 0;
            pointer-events: none;
            background:
                radial-gradient(ellipse 78% 54% at 18% -14%, rgba(6, 215, 245, .08) 0%, transparent 60%),
                radial-gradient(ellipse 60% 38% at 82% 110%, rgba(147, 51, 234, .07) 0%, transparent 60%);
            z-index: 0;
        }

        /* Login card - matching main panel design - darker */
        .login-card {
            position: relative;
            z-index: 10;
            width: 100%;
            max-width: 420px;
            margin: 16px;
            background: linear-gradient(145deg, rgba(13, 21, 35, 0.98), rgba(6, 10, 20, 0.99));
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 44px 40px 36px;
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            box-shadow:
                0 4px 6px -1px rgba(0, 0, 0, 0.3),
                0 2px 4px -1px rgba(0, 0, 0, 0.2),
                inset 0 1px 0 rgba(255, 255, 255, 0.05),
                0 0 0 1px rgba(6, 215, 245, 0.08);
            animation: cardIn 0.5s var(--ease-out) both;
        }

        @keyframes cardIn {
            from { opacity:0; transform: translateY(24px) scale(0.96); }
            to   { opacity:1; transform: translateY(0) scale(1); }
        }

        /* Top accent line */
        .login-card::before {
            content: '';
            position: absolute;
            top:0; left:10%; right:10%;
            height:1px;
            background: linear-gradient(90deg, transparent, var(--accent), transparent);
        }

        /* Subtle inner glow */
        .login-card::after {
            content: '';
            position: absolute;
            top:0; left:0; right:0;
            height:1px;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.06), transparent);
            pointer-events: none;
        }

        /* Lang switcher */
        .lang-switcher {
            position: absolute;
            top: 16px;
            right: 16px;
            display: flex;
            gap: 2px;
            background: rgba(255,255,255,0.04);
            border: 1px solid rgba(255,255,255,0.06);
            border-radius: 8px;
            padding: 2px;
        }
        .lang-btn {
            border: none;
            padding: 4px 10px;
            border-radius: 6px;
            cursor: pointer;
            font-size: 11px;
            font-weight: 700;
            background: transparent;
            color: var(--text-muted);
            letter-spacing: 0.5px;
            transition: background-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
        }
        .lang-btn:hover:not(.active) { color: var(--text); transform: translateY(-1px); }
        .lang-btn.active {
            background: var(--accent);
            color: #050a12;
        }
        .lang-btn:hover:not(.active) {
            color: var(--text);
        }

        /* Brand */
        .brand {
            text-align: center;
            margin-bottom: 36px;
        }
        .brand-logo-img {
            width:80px;
            height:80px;
            border-radius:20px;
            margin-bottom:16px;
            box-shadow:0 0 30px rgba(6,182,212,0.3);
            border:2px solid var(--border);
            object-fit:cover;
        }
        .brand h1 {
            font-size:26px;
            font-weight:800;
            color:var(--text);
            letter-spacing:1px;
            line-height:1;
            text-transform:uppercase;
            background:linear-gradient(90deg, var(--accent), #7c3aed);
            -webkit-background-clip:text;
            -webkit-text-fill-color:transparent;
        }
        .brand p {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 8px;
            font-weight: 500;
            letter-spacing: 0.5px;
        }

        /* Error box */
        .error-box {
            display: flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 77, 106, 0.1);
            border: 1px solid rgba(255, 77, 106, 0.25);
            border-radius: 10px;
            padding: 11px 14px;
            color: #ff8099;
            font-size: 13px;
            margin-bottom: 20px;
            /* animation: shake 0.4s ease; */
        }
        @keyframes shake {
            0%, 100% { transform: translateX(0); }
            25% { transform: translateX(-6px); }
            75% { transform: translateX(6px); }
        }
        .error-box i { font-size: 15px; flex-shrink: 0; }

        /* Form */
        .form-group { margin-bottom: 18px; }

        label {
            display: block;
            font-size: 11px;
            font-weight: 700;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.8px;
            margin-bottom: 8px;
        }

        .input-wrap { position: relative; }

        .input-wrap i.input-icon {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 14px;
            color: var(--text-muted);
            pointer-events: none;
            transition: color var(--t-fast) var(--ease);
        }

        input[type="password"],
        input[type="text"] {
            width:100%;
            background: rgba(255,255,255,0.03);
            border:1px solid rgba(255,255,255,0.08);
            color: var(--text);
            padding:13px 44px 13px 42px;
            border-radius: var(--radius-md);
            font-size:14px;
            outline:none;
            transition: border-color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
        }

        input[type="password"]:focus,
        input[type="text"]:focus {
            border-color: rgba(6, 182, 212, 0.5);
            background: rgba(6, 182, 212, 0.04);
            box-shadow: 0 0 0 3px var(--accent-dim);
        }

        input[type="password"]:focus,
        input[type="text"]:focus {
            border-color: rgba(0, 207, 255, 0.5);
            background: rgba(0, 207, 255, 0.04);
            box-shadow: 0 0 0 3px var(--accent-dim);
        }

        input[type="password"]:focus + i,
        input[type="text"]:focus + i,
        .input-wrap:focus-within i.input-icon {
            color: var(--accent);
        }

        input::placeholder { color: var(--text-muted); opacity: 0.6; }

        .eye-btn {
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: var(--text-muted);
            cursor: pointer;
            font-size: 15px;
            padding: 4px;
            line-height: 1;
            transition: color var(--t-fast) var(--ease);
        }
        .eye-btn:hover { color: var(--accent); }

        /* Submit button */
        .submit-btn {
            width: 100%;
            padding: 14px;
            background: linear-gradient(135deg, #06d7f5 0%, #0891b2 100%);
            border: none;
            border-radius: var(--radius-md);
            color: #030c14;
            font-size: 15px;
            font-weight: 800;
            cursor: pointer;
            transition: transform var(--t-med) var(--ease), box-shadow var(--t-med) var(--ease), filter var(--t-fast) var(--ease);
            margin-top: 6px;
            letter-spacing: 0.5px;
            position: relative;
            overflow: hidden;
            will-change: transform;
        }
        .submit-btn::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent 50%);
            opacity: 0;
            transition: opacity var(--t-fast) var(--ease);
        }
        .submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(6,215,245,0.35);
        }
        .submit-btn:hover::before { opacity: 1; }
        .submit-btn:active { transform: translateY(0); }
        .submit-btn.loading {
            pointer-events: none;
            opacity: 0.7;
        }
        .submit-btn i { margin-right: 8px; }

        /* Forgot password link butonu (link-btn) */
        .link-btn {
            width:100%;
            margin-top:10px;
            padding:10px 12px;
            background: transparent;
            border: 1px dashed rgba(255,255,255,0.18);
            border-radius: var(--radius-md);
            color: var(--text-muted);
            font-size: 13px;
            font-weight: 600;
            cursor: pointer;
            transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        .link-btn:hover {
            color: var(--accent);
            border-color: var(--accent);
            background: rgba(6,215,245,0.06);
        }
        .link-btn i { font-size: 14px; }

        /* Info box — forgot_password hatırlatması için (errBox ile paylaşır) */
        .error-box.info {
            background: rgba(6, 215, 245, 0.08);
            border-color: rgba(6, 215, 245, 0.25);
            color: var(--accent);
        }

        .sso-btn {
            width:100%;
            margin-top:10px;
            padding:12px;
            background:rgba(147,51,234,0.15);
            border:1px solid rgba(147,51,234,0.35);
            border-radius: var(--radius-md);
            color:#ddd6fe;
            font-size:14px;
            font-weight:700;
            cursor:pointer;
            transition: background-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
        }
        .sso-btn:hover { background:rgba(147,51,234,0.25); transform: translateY(-1px); }
        .sso-btn:active { transform: translateY(0); }
        .demo-btn {
            width:100%;
            margin-top:10px;
            padding:12px;
            background:rgba(6,215,245,0.12);
            border:1px solid rgba(6,215,245,0.3);
            border-radius: var(--radius-md);
            color:var(--accent);
            font-size:14px;
            font-weight:700;
            cursor:pointer;
            transition: background-color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
        }
        .demo-btn:hover {
            background:rgba(6,215,245,0.18);
            box-shadow:0 0 15px rgba(6,215,245,0.25);
            transform: translateY(-1px);
        }
        .demo-btn:active { transform: translateY(0); }

        /* Mobile uyumluluk: 480px altı telefon */
        @media (max-width: 480px) {
            .login-card { padding: 32px 24px 28px; border-radius: 16px; }
            .brand h1 { font-size: 22px; }
            .brand-logo-img { width: 64px; height: 64px; }
            .brand p { font-size: 13px; }
            .lang-switcher { top: 10px; right: 10px; }
            .lang-btn { padding: 4px 8px; font-size: 10px; }
            input[type="password"], input[type="text"] { font-size: 16px; padding: 12px 40px 12px 38px; }
        }

        /* Tablet uyumluluk: 768px */
        @media (min-width: 481px) and (max-width: 768px) {
            .login-card { max-width: 460px; }
        }

        /* Skip-link for screen readers (Headered but inline at top) */
        .sr-only {
            position: absolute !important;
            clip: rect(1px, 1px, 1px, 1px);
            clip-path: inset(50%);
            width: 1px;
            height: 1px;
            margin: -1px;
            overflow: hidden;
            padding: 0;
            white-space: nowrap;
        }
        .sr-only:focus, a.sr-only:focus {
            position: fixed !important;
            top: 8px;
            left: 8px;
            width: auto;
            height: auto;
            padding: 8px 14px;
            clip: auto;
            background: var(--accent);
            color: #030c14;
            z-index: 9999;
            border-radius: var(--radius-sm);
            font-weight: 700;
            text-decoration: none;
        }

        /* Footer */
        .login-footer {
            text-align: center;
            margin-top: 28px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.05);
        }
        .login-footer p {
            font-size: 12px;
            color: var(--text-muted);
            line-height: 1.8;
        }
        .login-footer code {
            color: var(--accent);
            background: var(--accent-dim);
            padding: 2px 8px;
            border-radius: 5px;
            font-size: 12px;
        }

        /* Version badge */
        .version-badge {
            position: fixed;
            bottom: 16px;
            left: 50%;
            transform: translateX(-50%);
            font-size: 11px;
            color: rgba(255,255,255,0.12);
            letter-spacing: 1px;
            z-index: 10;
        }