:root {
    --navy: #06283D;
    --navy-dark: #042635;
    --orange: #FF7A00;
    --orange-dark: #e46e00;
    --white: #FFFFFF;
    --input-border: #CBD5E1;
    --placeholder: #6B7280;
    --text-dark: #0F172A;
    --slider-radius: 14px;
}

/* ============================================
   OVERLAY (ARKA PLAN)
   ============================================ */
.slider-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(2, 6, 23, 0.55);
    backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
    z-index: 9998;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

/* Overlay görünür olduğunda */
body.login-slider-open #login-slider-overlay,
body.register-slider-open #register-slider-overlay,
body.verify-email-slider-open #verify-email-slider-overlay {
    opacity: 1;
    visibility: visible;
}

/* ============================================
   SLIDER PANEL (FORM KUTUSU)
   ============================================ */
.slider-panel {
    position: fixed;
    left: 50%;
    transform: translateX(-50%);
    top: -120%;
    width: 90%;
    max-width: 520px;
    padding: 28px 26px;
    background: linear-gradient(180deg, var(--navy) 0%, var(--navy-dark) 100%);
    border-radius: var(--slider-radius);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 20px 45px rgba(2, 6, 23, 0.6);
    color: var(--white);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    z-index: 9999;
    transition: top 0.35s cubic-bezier(0.2, 0.9, 0.3, 1);
    cursor: default;
    overflow-y: auto;
    max-height: 90vh;
}

/* Panel görünür olduğunda */
body.login-slider-open #login-slider,
body.register-slider-open #register-slider,
body.verify-email-slider-open #verify-email-slider {
    top: 5vh;
}

/* Body scroll'u engelle */
body.login-slider-open,
body.register-slider-open,
body.verify-email-slider-open {
    overflow: hidden !important;
    position: fixed;
    width: 100%;
    height: 100%;
}

/* ============================================
   BAŞLIKLAR
   ============================================ */
.slider-panel h2 {
    margin: 0 0 8px;
    font-size: 1.6rem;
    color: var(--white);
    font-weight: 700;
}

.slider-panel p.lead {
    margin: 0 0 18px;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.5;
}

/* ============================================
   KAPATMA BUTONU
   ============================================ */
.close-slider-btn {
    position: absolute;
    right: 18px;
    top: 14px;
    width: 34px;
    height: 34px;
    min-width: 34px;
    min-height: 34px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.06);
    color: rgba(255, 255, 255, 0.9);
    border: none;
    font-size: 20px;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10000;
    transition: all 0.3s ease;
    -webkit-tap-highlight-color: transparent;
}

.close-slider-btn:hover,
.close-slider-btn:active {
    background: rgba(255, 255, 255, 0.15);
    transform: scale(1.05);
}

/* ============================================
   FORM ALANLARI
   ============================================ */
.slider-form {
    max-width: 440px;
    margin: 0 auto;
    width: 100%;
}

.slider-form label {
    display: block;
    margin-bottom: 8px;
    color: rgba(255, 255, 255, 0.95);
    font-weight: 600;
    font-size: 0.95rem;
}

.slider-form input[type="text"],
.slider-form input[type="email"],
.slider-form input[type="tel"],
.slider-form input[type="password"] {
    width: 100%;
    padding: 12px 14px;
    border-radius: 8px;
    margin-bottom: 14px;
    background: var(--white);
    color: var(--text-dark);
    border: 1px solid var(--input-border);
    font-size: 0.95rem;
    box-sizing: border-box;
    transition: border-color 0.3s ease;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

.slider-form input[readonly] {
    opacity: 0.95;
    background: #f5f5f5;
}

.slider-form input:focus {
    outline: none;
    border-color: var(--orange);
    box-shadow: 0 0 0 3px rgba(255, 122, 0, 0.1);
}

/* Placeholder */
.slider-form input::placeholder {
    color: var(--placeholder);
    opacity: 1;
}

/* Autofill düzeltmesi */
.slider-form input:-webkit-autofill,
.slider-form input:-webkit-autofill:hover,
.slider-form input:-webkit-autofill:focus,
.slider-form input:-webkit-autofill:active {
    -webkit-box-shadow: 0 0 0px 1000px var(--white) inset !important;
    box-shadow: 0 0 0px 1000px var(--white) inset !important;
    -webkit-text-fill-color: var(--text-dark) !important;
}

/* ============================================
   BUTONLAR
   ============================================ */
.btn-primary {
    display: inline-block;
    width: 100%;
    padding: 12px 16px;
    border-radius: 10px;
    background: var(--orange);
    color: var(--white);
    font-weight: 700;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s ease;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.btn-primary:hover,
.btn-primary:active {
    background: var(--orange-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 122, 0, 0.3);
}

/* ============================================
   FOOTER LİNKLER
   ============================================ */
.slider-footer {
    text-align: center;
    margin-top: 16px;
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.92rem;
}

.slider-footer a {
    color: var(--orange);
    font-weight: 600;
    text-decoration: none;
    margin-left: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    -webkit-tap-highlight-color: transparent;
}

.slider-footer a:hover,
.slider-footer a:active {
    text-decoration: underline;
    opacity: 0.8;
}

/* ============================================
   MESAJ KUTULARI
   ============================================ */
.message-box {
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    line-height: 1.4;
}

.message-box.error {
    background: #fff1f0;
    color: #9b1b1b;
    border: 1px solid #f5c6c6;
}

.message-box.success {
    background: #ecf8ef;
    color: #1f6f3a;
    border: 1px solid #cbeed0;
}

/* ============================================
   MOBİL RESPONSIVE (768px ve altı)
   ============================================ */
@media (max-width: 768px) {
    /* Overlay daha koyu */
    .slider-overlay {
        background: rgba(2, 6, 23, 0.85);
    }

    /* Panel tam ekran benzeri */
    .slider-panel {
        position: fixed;
        left: 0 !important;
        right: 0 !important;
        transform: none !important;
        width: 100% !important;
        max-width: 100% !important;
        min-height: 100vh;
        max-height: none;
        top: 100% !important;
        border-radius: 0 !important;
        padding: 70px 20px 40px 20px;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    /* Panel açıldığında yukarıdan kayma */
    body.login-slider-open #login-slider,
    body.register-slider-open #register-slider,
    body.verify-email-slider-open #verify-email-slider {
        top: 0 !important;
    }

    /* Form alanı genişliği */
    .slider-form {
        max-width: 100%;
        padding: 0;
    }

    /* Başlıklar */
    .slider-panel h2 {
        font-size: 1.5rem;
        margin-bottom: 10px;
    }

    .slider-panel p.lead {
        font-size: 0.95rem;
        margin-bottom: 20px;
    }

    /* Input alanları - mobil optimize */
    .slider-form input[type="text"],
    .slider-form input[type="email"],
    .slider-form input[type="tel"],
    .slider-form input[type="password"] {
        padding: 15px 12px;
        font-size: 16px; /* iOS zoom'u engelle */
        border-radius: 10px;
        margin-bottom: 12px;
    }

    .slider-form label {
        font-size: 0.9rem;
        margin-bottom: 6px;
    }

    /* Buton */
    .btn-primary {
        padding: 16px 18px;
        font-size: 1.05rem;
        border-radius: 10px;
        font-weight: 700;
    }

    /* Kapatma butonu - daha büyük ve üstte */
    .close-slider-btn {
        width: 44px;
        height: 44px;
        min-width: 44px;
        min-height: 44px;
        right: 15px;
        top: 15px;
        font-size: 24px;
        background: rgba(255, 255, 255, 0.15);
        border: 2px solid rgba(255, 255, 255, 0.25);
        border-radius: 8px;
    }

    .close-slider-btn:active {
        background: rgba(255, 255, 255, 0.25);
        transform: scale(0.95);
    }

    /* Footer */
    .slider-footer {
        font-size: 0.9rem;
        margin-top: 24px;
        padding-bottom: 20px;
    }

    /* Mesaj kutuları */
    .message-box {
        font-size: 0.9rem;
        padding: 12px 14px;
        margin-bottom: 12px;
    }
}

/* ============================================
   ÇOK KÜÇÜK EKRANLAR (400px ve altı)
   ============================================ */
@media (max-width: 400px) {
    .slider-panel {
        padding: 50px 16px 16px 16px;
    }

    .slider-panel h2 {
        font-size: 1.3rem;
    }

    .slider-panel p.lead {
        font-size: 0.9rem;
    }

    .slider-form input[type="text"],
    .slider-form input[type="email"],
    .slider-form input[type="tel"],
    .slider-form input[type="password"] {
        padding: 14px 10px;
        font-size: 16px;
    }

    .btn-primary {
        padding: 15px 16px;
        font-size: 1rem;
    }

    .close-slider-btn {
        width: 40px;
        height: 40px;
        right: 12px;
        top: 12px;
        font-size: 22px;
    }
}

/* ============================================
   LANDSCAPE MOBİL (Yatay ekran)
   ============================================ */
@media (max-width: 768px) and (orientation: landscape) {
    .slider-panel {
        padding: 50px 20px 20px 20px;
    }

    .slider-panel h2 {
        font-size: 1.3rem;
        margin-bottom: 8px;
    }

    .slider-panel p.lead {
        font-size: 0.85rem;
        margin-bottom: 12px;
    }

    .slider-form input[type="text"],
    .slider-form input[type="email"],
    .slider-form input[type="tel"],
    .slider-form input[type="password"] {
        padding: 12px 10px;
        margin-bottom: 10px;
    }

    .slider-form label {
        margin-bottom: 4px;
    }

    .btn-primary {
        padding: 12px 16px;
    }
}

/* ============================================
   TOUCH DEVICE OPTİMİZASYONU
   ============================================ */
@media (hover: none) and (pointer: coarse) {
    /* Touch cihazlar için daha büyük dokunma alanları */
    .close-slider-btn {
        min-width: 44px;
        min-height: 44px;
    }

    .slider-footer a {
        padding: 8px 4px;
        display: inline-block;
    }

    /* iOS Safari bounce efektini engelle */
    .slider-panel {
        overscroll-behavior: contain;
    }
}

/* ============================================
   SAFE AREA (iPhone X ve üzeri için)
   ============================================ */
@supports (padding: max(0px)) {
    @media (max-width: 768px) {
        .slider-panel {
            padding-left: max(20px, env(safe-area-inset-left));
            padding-right: max(20px, env(safe-area-inset-right));
            padding-top: max(60px, env(safe-area-inset-top));
            padding-bottom: max(20px, env(safe-area-inset-bottom));
        }
    }
}