/* Global Styles */
@import url('https://fonts.googleapis.com/css2?family=Kanit:wght@300;400;500;600;700&display=swap');

:root {
    --primary: #0ea5e9;
    --primary-dark: #0284c7;
    --primary-light: #38bdf8;
    --bg-gradient: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 50%, #e0f2fe 100%);
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    height: 100%;
}

body {
    background: var(--bg-gradient);
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    min-height: -webkit-fill-available;
    font-family: 'Kanit', sans-serif;
    color: var(--text-color);
    padding: 16px;
}

/* Login Container */
.login-container {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 40px 36px;
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 420px;
    position: relative;
    animation: fadeInUp 0.5s ease-out;
}

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

/* Logo & Title */
.login-header {
    text-align: center;
    margin-bottom: 28px;
}

.login-container h1 {
    font-size: 26px;
    color: var(--primary-dark);
    text-align: center;
    margin-bottom: 8px;
    font-weight: 600;
    letter-spacing: -0.3px;
}

.logo-img {
    max-width: 240px;
    width: 80%;
    height: auto;
    margin-bottom: 16px;
    filter: drop-shadow(0 4px 6px rgba(14, 165, 233, 0.2));
    transition: transform 0.3s ease;
}

.logo-img:hover {
    transform: scale(1.03);
}

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

.form-group label {
    display: block;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 8px;
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    background-color: #f8fafc;
    font-size: 16px;
    font-family: 'Kanit', sans-serif;
    transition: all 0.3s ease;
    box-sizing: border-box;
    /* Prevent iOS zoom on focus */
    -webkit-appearance: none;
    appearance: none;
}

.form-group input:focus {
    border-color: var(--primary);
    background-color: #fff;
    outline: none;
    box-shadow: 0 0 0 4px rgba(14, 165, 233, 0.1);
}

/* Login Button */
.login-btn {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #ffffff;
    padding: 14px;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    width: 100%;
    font-size: 16px;
    font-weight: 600;
    font-family: 'Kanit', sans-serif;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
    -webkit-appearance: none;
    appearance: none;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(14, 165, 233, 0.4);
}

.login-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(14, 165, 233, 0.3);
}

/* Divider */
.divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 20px 0;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid #e2e8f0;
}

.divider span {
    padding: 0 10px;
    color: #94a3b8;
    font-size: 0.85rem;
}

/* LINE Login Button */
.line-login-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #06C755;
    color: white;
    text-decoration: none;
    padding: 14px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    font-family: 'Kanit', sans-serif;
    transition: all 0.3s;
}

.line-login-btn:hover {
    background-color: #05b34c;
    box-shadow: 0 4px 12px rgba(6, 199, 85, 0.3);
    color: white;
    transform: translateY(-2px);
}

.line-login-btn:active {
    transform: translateY(0);
}

.line-login-btn i {
    font-size: 1.4rem;
    margin-right: 8px;
}

/* ========================================
   Responsive - Tablet
   ======================================== */
@media (max-width: 768px) {
    body {
        padding: 12px;
    }

    .login-container {
        padding: 32px 28px;
        border-radius: 20px;
    }
}

/* ========================================
   Responsive - Mobile
   ======================================== */
@media (max-width: 480px) {
    body {
        padding: 16px;
        align-items: center;
    }

    .login-container {
        padding: 32px 24px;
        margin: auto;
        border-radius: 20px;
        min-height: auto;
    }

    .login-container h1 {
        font-size: 22px;
    }

    .logo-img {
        width: 180px;
        max-width: 100%;
    }

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

    .form-group input {
        padding: 13px 14px;
        border-radius: 10px;
    }

    .login-btn {
        padding: 14px;
        border-radius: 10px;
        font-size: 15px;
    }

    .line-login-btn {
        padding: 14px;
        border-radius: 10px;
        font-size: 15px;
    }

    .divider {
        margin: 16px 0;
    }
}

/* ========================================
   Responsive - Very small phones
   ======================================== */
@media (max-width: 360px) {
    .login-container {
        padding: 24px 18px;
        padding-top: 36px;
    }

    .login-container h1 {
        font-size: 20px;
    }

    .logo-img {
        max-width: 180px;
    }

    .form-group input {
        padding: 12px;
        font-size: 15px;
    }
}

/* ========================================
   Safe Area for notch phones (iPhone X+)
   ======================================== */
@supports (padding: env(safe-area-inset-top)) {
    @media (max-width: 480px) {
        .login-container {
            /* Keep safe area padding if needed, but not forcing full screen */
        }
    }
}