@import url('https://fonts.googleapis.com/css2?family=Bai+Jamjuree:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary: #1c1511; /* สีน้ำตาลเข้มไปทางดำ */
    --primary-hover: #FEDE16; /* สีเหลืองทอง */
    --primary-glow: rgba(28, 21, 17, 0.45);
    --bg-dark: #09090b;
    --card-bg: rgba(17, 17, 27, 0.65);
    --card-border: rgba(255, 255, 255, 0.08);
    --text-primary: #f4f4f5;
    --text-secondary: #a1a1aa;
    --font-sans: 'Bai Jamjuree', 'Inter', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    position: relative;
}

/* Background Gradients */
.background-container {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.45;
    animation: float 20s infinite alternate ease-in-out;
}

.blob-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #1c1511 0%, #09090b 100%);
    top: -10%;
    left: -10%;
}

.blob-2 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, #3e2f25 0%, #1c1511 100%);
    bottom: -15%;
    right: -10%;
    animation-delay: -5s;
}

.blob-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(254, 222, 22, 0.08) 0%, rgba(28, 21, 17, 0) 100%);
    top: 40%;
    left: 60%;
    animation-delay: -10s;
}

@keyframes float {
    0% {
        transform: translate(0, 0) scale(1) rotate(0deg);
    }
    50% {
        transform: translate(50px, -50px) scale(1.1) rotate(180deg);
    }
    100% {
        transform: translate(-30px, 30px) scale(0.9) rotate(360deg);
    }
}

/* Glassmorphism Card Container */
.login-container {
    width: 100%;
    max-width: 440px;
    padding: 2.5rem;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-radius: 24px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4),
                inset 0 1px 0 rgba(255, 255, 255, 0.1);
    z-index: 10;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeIn 0.8s ease-out;
}

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

.logo-header {
    text-align: center;
    margin-bottom: 2rem;
}

.logo-icon {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, #FEDE16 0%, #1c1511 100%);
    border-radius: 20px;
    margin-bottom: 1rem;
    box-shadow: 0 8px 24px var(--primary-glow);
    font-size: 2.2rem;
    font-weight: 700;
    color: white;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
    overflow: hidden;
}

.logo-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: inherit;
}

.logo-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(to right, #ffffff, #d4d4d8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.35rem;
    letter-spacing: -0.5px;
}

.logo-header p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Input Styles */
.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    padding-left: 0.25rem;
}

.input-wrapper {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
}

.form-group input {
    width: 100%;
    padding: 0.85rem 1rem 0.85rem 2.8rem;
    background: rgba(9, 9, 11, 0.6);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    transition: all 0.2s ease;
}

.form-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-glow);
    background: rgba(9, 9, 11, 0.8);
}

/* Buttons */
.btn-login {
    width: 100%;
    padding: 1rem;
    background: var(--primary);
    border: 1px solid rgba(254, 222, 22, 0.2);
    border-radius: 12px;
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: 0 4px 15px var(--primary-glow);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 2rem;
}

.btn-login:hover {
    background: var(--primary-hover);
    color: #1c1511;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(254, 222, 22, 0.45);
}

.btn-login:active {
    transform: translateY(1px);
}

.btn-login:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* Error/Message styles */
.alert-box {
    padding: 0.75rem 1rem;
    border-radius: 10px;
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
    display: none;
    animation: shake 0.4s ease;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #f87171;
}

.alert-success {
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #34d399;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-6px); }
    75% { transform: translateX(6px); }
}

/* Custom Loader */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s infinite linear;
    display: none;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Systems Modal (Systems Panel Overlay) */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(9, 9, 11, 0.75);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    z-index: 100;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background: rgba(17, 17, 27, 0.75);
    border: 1px solid var(--card-border);
    border-radius: 28px;
    width: 90%;
    max-width: 680px;
    padding: 3rem;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5);
    transform: scale(0.92);
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    text-align: center;
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

.modal-header {
    margin-bottom: 2.5rem;
}

.modal-header h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #ffffff, #a1a1aa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.modal-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* System Grid */
.system-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    max-height: 420px;
    overflow-y: auto;
    padding: 0.5rem;
    margin-bottom: 1.5rem;
}

/* Custom Scrollbar for Grid */
.system-grid::-webkit-scrollbar {
    width: 6px;
}
.system-grid::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
    border-radius: 10px;
}
.system-grid::-webkit-scrollbar-thumb {
    background: var(--card-border);
    border-radius: 10px;
}
.system-grid::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

.system-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 1.25rem 1rem;
    cursor: pointer;
    text-decoration: none;
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.system-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(254, 222, 22, 0.12) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.system-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-hover);
    box-shadow: 0 8px 25px rgba(254, 222, 22, 0.25);
    background: rgba(255, 255, 255, 0.05);
}

.system-card:hover::before {
    opacity: 1;
}

.system-icon {
    width: 48px;
    height: 48px;
    background: rgba(80, 77, 78, 0.15);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 0.75rem;
    color: #a39e9e;
    font-size: 1.3rem;
    transition: all 0.3s ease;
    z-index: 2;
}

.system-card:hover .system-icon {
    background: var(--primary-hover);
    color: var(--primary);
    box-shadow: 0 4px 15px rgba(254, 222, 22, 0.35);
}

.system-name {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    z-index: 2;
    text-align: center;
}

.system-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
    z-index: 2;
    text-align: center;
    line-height: 1.3;
}

.btn-logout {
    margin-top: 1.5rem;
    padding: 0.6rem 1.5rem;
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-secondary);
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s ease;
}

.btn-logout:hover {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
    color: #f87171;
}

/* Responsive fixes */
@media (max-width: 640px) {
    .modal-content {
        padding: 2rem 1rem;
        width: 95%;
    }
    .system-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }
    .login-container {
        padding: 2rem 1.5rem;
        margin: 1rem;
    }
}