/* ===========================================
   ESAS Authentication Portal - Modern UI
   Matching energysolutions-solar.com branding
   =========================================== */

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

/* CSS Variables for Brand Colors */
:root {
    --esas-green: #00a651;
    --esas-green-dark: #008c45;
    --esas-green-light: #e8f5e9;
    --esas-orange: #f8b400;
    --esas-orange-dark: #e09500;
    --esas-navy: #1a3a5c;
    --esas-gray-dark: #333333;
    --esas-gray-medium: #666666;
    --esas-gray-light: #f5f5f5;
    --esas-white: #ffffff;
    --esas-red: #e74c3c;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.16);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* General Reset & Base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #f8faf8 0%, #e8f5e9 50%, #f0f7f0 100%);
    color: var(--esas-gray-dark);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    line-height: 1.6;
}

/* Animated Background Pattern */
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(0, 166, 81, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(248, 180, 0, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(0, 166, 81, 0.03) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

/* Header */
header {
    background: linear-gradient(135deg, var(--esas-white) 0%, rgba(255, 255, 255, 0.95) 100%);
    backdrop-filter: blur(10px);
    padding: 24px 20px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    position: relative;
    opacity: 0;
    transform: translateY(-20px);
    animation: fadeSlideIn 0.8s ease-out forwards;
}

header::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--esas-green), var(--esas-orange), var(--esas-green));
}

.logo-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

#logo {
    width: 70px;
    height: auto;
    transition: var(--transition);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

#logo:hover {
    transform: scale(1.05) rotate(-2deg);
}

header h1 {
    color: var(--esas-navy);
    font-size: clamp(1.25rem, 4vw, 1.75rem);
    font-weight: 600;
    letter-spacing: -0.02em;
}

/* Navigation */
nav {
    background: var(--esas-white);
    padding: 0;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
    opacity: 0;
    transform: translateY(-20px);
    animation: fadeSlideIn 0.8s ease-out forwards 0.1s;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 4px;
    padding: 8px 16px;
    max-width: 800px;
    margin: 0 auto;
}

nav ul li {
    margin: 0;
}

nav ul li a {
    color: var(--esas-gray-dark);
    text-decoration: none;
    padding: 12px 20px;
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

nav ul li a::after {
    content: "";
    position: absolute;
    bottom: 6px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--esas-green);
    transition: var(--transition);
    transform: translateX(-50%);
}

nav ul li a:hover {
    color: var(--esas-green);
    background: var(--esas-green-light);
}

nav ul li a:hover::after {
    width: 60%;
}

/* Main Content */
main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}

/* Login Box */
.login-box {
    background: var(--esas-white);
    padding: 48px 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 420px;
    width: 100%;
    text-align: center;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeSlideUp 0.8s ease-out forwards 0.3s;
    position: relative;
    overflow: hidden;
}

.login-box::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--esas-green), var(--esas-orange));
}

.login-box h2 {
    color: var(--esas-navy);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.login-box p {
    color: var(--esas-gray-medium);
    font-size: 0.95rem;
    margin-bottom: 8px;
    line-height: 1.5;
}

.login-box p strong {
    color: var(--esas-gray-dark);
}

/* Error State Login Box */
.login-box[style*="background-color: #fff0f0"],
.login-box[style*="border: 2px solid red"] {
    border: 2px solid var(--esas-red) !important;
    background: linear-gradient(to bottom, #fef2f2, #ffffff) !important;
}

.login-box[style*="background-color: #fff0f0"] h2,
.login-box[style*="border: 2px solid red"] h2 {
    color: var(--esas-red);
}

.login-box[style*="background-color: #fff0f0"]::before,
.login-box[style*="border: 2px solid red"]::before {
    background: var(--esas-red);
}

/* Buttons */
.login-btn, .logout-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    margin-top: 24px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

.login-btn {
    background: linear-gradient(135deg, var(--esas-green) 0%, var(--esas-green-dark) 100%);
    color: var(--esas-white);
    box-shadow: 0 4px 14px rgba(0, 166, 81, 0.35);
}

.login-btn::before {
    content: "→";
    position: absolute;
    right: 24px;
    opacity: 0;
    transform: translateX(-10px);
    transition: var(--transition);
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 166, 81, 0.45);
    padding-right: 44px;
}

.login-btn:hover::before {
    opacity: 1;
    transform: translateX(0);
}

.login-btn:active {
    transform: translateY(0) scale(0.98);
}

.logout-btn {
    background: linear-gradient(135deg, var(--esas-gray-medium) 0%, #555555 100%);
    color: var(--esas-white);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
    margin-left: 12px;
}

.logout-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    background: linear-gradient(135deg, #555555 0%, #444444 100%);
}

.logout-btn:active {
    transform: translateY(0) scale(0.98);
}

/* Microsoft Logout Button */
.ms-logout-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--esas-red) 0%, #c0392b 100%);
    color: white;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 14px rgba(231, 76, 60, 0.3);
    transition: var(--transition);
}

.ms-logout-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.4);
}

.ms-logout-btn:active {
    transform: translateY(0) scale(0.98);
}

/* Disclaimer Text */
.disclaimer {
    margin-top: 20px;
    padding: 16px;
    background: var(--esas-gray-light);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--esas-orange);
}

.disclaimer p {
    font-size: 0.8rem;
    color: var(--esas-gray-medium);
    text-align: left;
    margin: 0;
}

/* Error Page Styling */
.login-box ol, .login-box ul {
    text-align: left;
    max-width: 100%;
    margin: 16px auto;
    padding-left: 24px;
}

.login-box ol li, .login-box ul li {
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--esas-gray-medium);
}

.login-box ol li strong, .login-box ul li strong {
    color: var(--esas-gray-dark);
}

/* Footer */
footer {
    background: var(--esas-navy);
    color: var(--esas-white);
    text-align: center;
    padding: 20px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeSlideUp 0.8s ease-out forwards 0.5s;
}

footer p {
    font-size: 0.85rem;
    opacity: 0.9;
}

/* Animations */
@keyframes fadeSlideIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeSlideUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes subtleBounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
}

.bounce {
    animation: subtleBounce 0.6s ease;
}

/* Subtle pulse for login button */
@keyframes pulse {
    0%, 100% {
        box-shadow: 0 4px 14px rgba(0, 166, 81, 0.35);
    }
    50% {
        box-shadow: 0 4px 20px rgba(0, 166, 81, 0.5);
    }
}

.login-btn:not(:hover) {
    animation: pulse 3s ease-in-out infinite;
}

/* Responsive Design */
@media (max-width: 600px) {
    header {
        padding: 20px 16px;
    }

    .logo-container {
        flex-direction: column;
        gap: 12px;
    }

    #logo {
        width: 60px;
    }

    header h1 {
        font-size: 1.25rem;
    }

    nav ul {
        gap: 2px;
        padding: 6px 12px;
    }

    nav ul li a {
        padding: 10px 14px;
        font-size: 0.8rem;
    }

    main {
        padding: 24px 16px;
    }

    .login-box {
        padding: 36px 24px;
        margin: 0 8px;
    }

    .login-box h2 {
        font-size: 1.3rem;
    }

    .login-btn, .logout-btn {
        padding: 12px 24px;
        font-size: 0.9rem;
        width: 100%;
        margin-left: 0;
    }

    .logout-btn {
        margin-top: 12px;
    }
}

/* Focus States for Accessibility */
a:focus-visible, button:focus-visible {
    outline: 2px solid var(--esas-green);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    header, nav, footer, .login-btn, .logout-btn, .ms-logout-btn {
        display: none;
    }

    body {
        background: white;
    }

    .login-box {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}