:root {
    --p-blue: #6366f1;
    --p-bg: #f8fafc;
    --p-card: #ffffff;
    --p-text: #0f172a;
    --p-sub: #64748b;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Plus Jakarta Sans', sans-serif;
}

body {
    background: var(--p-bg);
    background-image:
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.08) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(16, 185, 129, 0.05) 0px, transparent 50%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

/* ANA KONTEYNER */
.auth-container {
    width: 100%;
    max-width: 450px;
    perspective: 1000px;
}

.auth-logo {
    text-align: center;
    margin-bottom: 30px;
}

.auth-logo .icon {
    width: 60px;
    height: 60px;
    background: white;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    margin: 0 auto 15px auto;
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.15);
}

.auth-logo h2 {
    font-size: 28px;
    font-weight: 800;
    color: var(--p-text);
    letter-spacing: -1px;
}

/* TAB SİSTEMİ */
.auth-card {
    background: var(--p-card);
    border-radius: 35px;
    padding: 40px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.05);
}

.tab-switcher {
    display: flex;
    background: #f1f5f9;
    padding: 6px;
    border-radius: 18px;
    margin-bottom: 35px;
}

.tab-btn {
    flex: 1;
    padding: 12px;
    border: none;
    background: transparent;
    font-size: 14px;
    font-weight: 700;
    color: var(--p-sub);
    cursor: pointer;
    border-radius: 14px;
    transition: all 0.3s ease;
}

.tab-btn.active {
    background: white;
    color: var(--p-blue);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

/* FORM ELEMANLARI */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 700;
    color: var(--p-text);
    margin-bottom: 8px;
    padding-left: 5px;
}

.input-style {
    width: 100%;
    padding: 16px 20px;
    border-radius: 16px;
    border: 1px solid #e2e8f0;
    background: #f8fafc;
    font-size: 15px;
    font-weight: 600;
    transition: all 0.3s;
    outline: none;
}

.input-style:focus {
    background: white;
    border-color: var(--p-blue);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.action-btn {
    width: 100%;
    padding: 18px;
    border: none;
    background: var(--p-text);
    color: white;
    border-radius: 18px;
    font-size: 16px;
    font-weight: 800;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 10px;
}

.action-btn:hover {
    background: var(--p-blue);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.2);
}

/* GEÇİŞ ANİMASYONU */
.form-content {
    transition: opacity 0.3s ease;
    display: none;
}

.form-content.active {
    display: block;
    opacity: 1;
}

.footer-note {
    text-align: center;
    margin-top: 25px;
    font-size: 13px;
    color: var(--p-sub);
    font-weight: 500;
}

.footer-note a {
    color: var(--p-blue);
    text-decoration: none;
    font-weight: 700;
}

.auth-message {
    margin-top: 20px;
    padding: 12px;
    border-radius: 10px;
    text-align: center;
    font-size: 14px;
    display: none;
}

.auth-message.show {
    display: block;
}

.auth-message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.auth-message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.auth-message.info {
    background: #cce5ff;
    color: #004085;
    border: 1px solid #b8daff;
}