<style>
/* =========================================
   AQUARIUM - ULTRA MODERN LIGHT THEME
   (Öğretmen & Veli Dostu, Temiz, Minimal Arayüz)
   ========================================= */

/* --- 1. GLOBAL & RESET --- */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    color: #1e293b; /* Koyu slate gri - okunabilirlik için siyahtan daha yumuşak */
}

/* --- 2. ÜST MENÜ (HEADER) --- */
.quick-start .quick-header {
    width: min(1100px, calc(100% - 32px)) !important;
    height: auto !important;
    margin: 24px auto 16px !important;
    padding: 12px 24px !important;
    background: rgba(255, 255, 255, 0.95) !important;
    border: 1px solid rgba(226, 232, 240, 0.8) !important;
    border-radius: 100px !important;
    box-shadow: 0 4px 20px rgba(15, 23, 42, 0.04) !important;
    backdrop-filter: blur(12px) !important;
}
.quick-start .quick-header .logo>i {
    background: linear-gradient(135deg, #0ea5e9, #38bdf8) !important;
    color: #fff !important;
    border-radius: 50% !important;
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3) !important;
}
.quick-start .quick-header .logo b { color: #0f172a !important; font-weight: 700 !important; }
.quick-start .quick-header .logo small { color: #64748b !important; }
.quick-start .soft-button {
    background: #f1f5f9 !important;
    color: #334155 !important;
    font-weight: 600 !important;
    border-radius: 100px !important;
}
.quick-start .soft-button:hover {
    background: #e2e8f0 !important;
    color: #0f172a !important;
}

/* --- 3. ANA AKVARYUM SAHNESİ --- */
.quick-start .welcome-stage {
    width: min(1200px, calc(100% - 32px)) !important;
    background: #ffffff !important;
    border: 1px solid rgba(226, 232, 240, 0.8) !important;
    border-radius: 32px !important;
    padding: 12px !important;
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.06) !important;
}
.quick-start .welcome-water {
    border-radius: 24px !important;
    border: 1px solid rgba(0,0,0,0.05) !important;
}
.quick-start .welcome-center {
    background: rgba(255, 255, 255, 0.95) !important;
    border: 1px solid rgba(226, 232, 240, 0.8) !important;
    border-radius: 28px !important;
    padding: 40px !important;
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.08) !important;
    backdrop-filter: blur(12px) !important;
    color: #0f172a !important;
    text-shadow: none !important;
}
.quick-start .welcome-center span { color: #0ea5e9 !important; font-weight: 700 !important; }
.quick-start .welcome-center h1 { color: #0f172a !important; font-weight: 800 !important; letter-spacing: -0.03em !important; }
.quick-start .welcome-center p { color: #475569 !important; font-weight: 500 !important; }

/* --- 4. MODAL ARKA PLANI --- */
.quick-start .modal {
    background: rgba(15, 23, 42, 0.3) !important; /* Ferah ve hafif karanlık */
    backdrop-filter: blur(8px) !important;
    -webkit-backdrop-filter: blur(8px) !important;
}
.quick-start .modal.hidden { display: none !important; }

/* --- 5. BEYAZ, TERTEMİZ KARTLAR (MODAL İÇİ) --- */
.quick-start .step-card,
.quick-start .modal > section {
    background: #ffffff !important;
    width: min(480px, calc(100vw - 32px)) !important;
    padding: 48px 40px 40px !important;
    border-radius: 32px !important;
    box-shadow: 0 25px 50px rgba(15, 23, 42, 0.15), 0 0 0 1px rgba(226, 232, 240, 1) !important;
    color: #0f172a !important;
}
.quick-start .modal-close {
    background: #f1f5f9 !important;
    color: #64748b !important;
    border-radius: 50% !important;
    width: 36px !important;
    height: 36px !important;
    display: grid !important;
    place-items: center !important;
    transition: all 0.2s !important;
}
.quick-start .modal-close:hover { background: #e2e8f0 !important; color: #0f172a !important; }

/* --- 6. YENİ NESİL STEPPER (ADIM ÇUBUĞU) --- */
.quick-start .step-progress {
    display: flex !important;
    gap: 8px !important;
    margin-bottom: 32px !important;
    justify-content: center !important;
}
.quick-start .step-progress:before { display: none !important; } /* Eski çizgiyi kaldır */
.quick-start .step-progress i {
    width: 32px !important;
    height: 8px !important; /* Yuvarlak yerine modern hap tasarımı */
    background: #e2e8f0 !important;
    border-radius: 8px !important;
    border: none !important;
    color: transparent !important; /* Rakamları gizle, sadece bar dolsun */
    font-size: 0 !important;
    transition: all 0.3s ease !important;
}
.quick-start .step-progress i.active { background: #bae6fd !important; } /* Tamamlanan adımlar */
.quick-start .step-progress i.current {
    background: #0ea5e9 !important; /* Aktif adım */
    width: 48px !important; /* Aktif adım daha uzun */
}

/* --- 7. TİPOGRAFİ (MODAL İÇİ) --- */
.quick-start .step-pane h2,
.quick-start .modal > section h2 {
    font-family: inherit !important;
    font-size: 1.75rem !important;
    font-weight: 800 !important;
    color: #0f172a !important;
    letter-spacing: -0.03em !important;
    margin-bottom: 8px !important;
}
.quick-start .step-pane p,
.quick-start .modal > section p {
    font-style: normal !important;
    font-size: 0.95rem !important;
    color: #64748b !important;
    margin-bottom: 24px !important;
    line-height: 1.5 !important;
}

/* --- 8. SEÇİM BUTONLARI (ÖĞRETMEN, VELİ) --- */
.quick-start .choice-grid {
    gap: 12px !important;
    margin-bottom: 24px !important;
}
.quick-start .choice-button {
    background: #ffffff !important;
    border: 2px solid #e2e8f0 !important;
    border-radius: 20px !important;
    padding: 20px 12px !important;
    box-shadow: 0 2px 4px rgba(15,23,42,0.02) !important;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1) !important;
}
.quick-start .choice-button:hover {
    border-color: #cbd5e1 !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 10px 20px rgba(15,23,42,0.05) !important;
}
.quick-start .choice-button.selected {
    border-color: #0ea5e9 !important;
    background: #f0f9ff !important;
    box-shadow: 0 10px 20px rgba(14,165,233,0.1) !important;
}
.quick-start .choice-button:first-letter { font-size: 2rem !important; display: block; margin-bottom: 8px; }
.quick-start .choice-button b { color: #0f172a !important; font-size: 0.85rem !important; font-weight: 700 !important; }
.quick-start .choice-button small { color: #64748b !important; font-size: 0.7rem !important; margin-top: 4px !important; }

/* --- 9. FORM İNPUTLARI --- */
.quick-start .step-pane label,
.quick-start .modal > section label {
    font-style: normal !important;
    font-weight: 600 !important;
    color: #334155 !important;
    font-size: 0.85rem !important;
    margin-bottom: 6px !important;
}
.quick-start .step-pane label span { color: #94a3b8 !important; font-weight: 400 !important; }
.quick-start .step-pane input,
.quick-start .modal > section input {
    height: 52px !important;
    background: #f8fafc !important;
    border: 2px solid #e2e8f0 !important;
    border-radius: 16px !important;
    color: #0f172a !important;
    font-size: 1rem !important;
    font-weight: 500 !important;
    padding: 0 16px !important;
    transition: all 0.2s ease !important;
    box-shadow: none !important;
}
.quick-start .step-pane input:focus,
.quick-start .modal > section input:focus {
    background: #ffffff !important;
    border-color: #38bdf8 !important;
    outline: none !important;
    box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.15) !important;
}
.quick-start .step-pane input::placeholder { color: #94a3b8 !important; font-weight: 400 !important; }

/* --- 10. BUTONLAR (İLERİ, GERİ, GİRİŞ) --- */
.quick-start .step-next,
.quick-start .primary-button,
.quick-start .welcome-button {
    background: #0f172a !important; /* Çok şık koyu buton */
    color: #ffffff !important;
    height: 52px !important;
    border-radius: 16px !important;
    font-size: 0.95rem !important;
    font-weight: 700 !important;
    letter-spacing: 0.01em !important;
    box-shadow: 0 8px 16px rgba(15, 23, 42, 0.2) !important;
    transition: all 0.3s ease !important;
    width: 100% !important;
    margin-top: 12px !important;
}
.quick-start .step-next:hover,
.quick-start .primary-button:hover,
.quick-start .welcome-button:hover {
    background: #1e293b !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 12px 24px rgba(15, 23, 42, 0.3) !important;
}
.quick-start .step-next:disabled {
    background: #e2e8f0 !important;
    color: #94a3b8 !important;
    box-shadow: none !important;
    transform: none !important;
    cursor: not-allowed !important;
}
.quick-start .step-back {
    color: #64748b !important;
    background: #f1f5f9 !important;
    padding: 10px 16px !important;
    border-radius: 12px !important;
    font-size: 0.85rem !important;
    font-weight: 600 !important;
    margin-bottom: 20px !important;
    display: inline-flex !important;
}
.quick-start .step-back:hover { background: #e2e8f0 !important; color: #0f172a !important; }

/* Alt Linkler */
.quick-start .modal-login {
    color: #64748b !important;
    font-size: 0.85rem !important;
    font-weight: 600 !important;
    margin-top: 24px !important;
}
.quick-start .modal-login:hover { color: #0ea5e9 !important; }

/* Hata mesajı tasarımı */
.quick-start .form-message.error {
    background: #fef2f2 !important;
    color: #991b1b !important;
    border: 1px solid #fecaca !important;
    padding: 12px 16px !important;
    border-radius: 12px !important;
    margin-bottom: 20px !important;
    font-weight: 500 !important;
}

/* MOBİL UYUM */
@media(max-width:520px) {
    .quick-start .step-card,
    .quick-start .modal > section {
        padding: 32px 24px 24px !important;
    }
    .quick-start .choice-grid { grid-template-columns: 1fr !important; gap: 8px !important; }
    .quick-start .choice-button {
        display: flex !important;
        align-items: center !important;
        text-align: left !important;
        padding: 12px 16px !important;
        min-height: auto !important;
    }
    .quick-start .choice-button:first-letter { margin: 0 12px 0 0 !important; font-size: 1.5rem !important; }
    .quick-start .choice-button div { display: grid; }
    .quick-start .welcome-center { padding: 24px !important; }
}
</style>