/* ----------------------------------------------------
   KruProject Energy Portal - Premium CSS Style Sheet
   Designed with Modern Aesthetics and Dark Glassmorphism
---------------------------------------------------- */

:root {
    /* Color Palette */
    --bg-dark: #0a0e0b;
    --bg-darker: #050706;
    --bg-card: rgba(18, 26, 20, 0.72);
    --bg-glass: rgba(15, 23, 17, 0.45);
    
    --color-green: #3cd070;
    --color-green-glow: rgba(60, 208, 112, 0.35);
    
    --color-orange: #f47d1e;
    --color-orange-glow: rgba(244, 125, 30, 0.35);
    
    --color-gold: #f5b032;
    --color-gold-glow: rgba(245, 176, 50, 0.25);
    
    --text-primary: #f0f4f1;
    --text-secondary: #a0b0a5;
    --text-dark: #121613;
    
    --border-color: rgba(60, 208, 112, 0.2);
    --border-gold: rgba(245, 176, 50, 0.4);
    --border-orange: rgba(244, 125, 30, 0.4);
    
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: 'Inter', 'Kanit', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Ambient glow elements */
.glow-bg {
    position: absolute;
    width: 450px;
    height: 450px;
    border-radius: 50%;
    filter: blur(120px);
    z-index: -1;
    opacity: 0.22;
    pointer-events: none;
}

.glow-green {
    background-color: var(--color-green);
    top: 10%;
    left: -10%;
}

.glow-orange {
    background-color: var(--color-orange);
    top: 60%;
    right: -10%;
}

/* Typography styles */
h1, h2, h3, h4 {
    font-weight: 600;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-green), var(--color-gold), var(--color-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
}

.accent-text {
    color: var(--color-green);
}

.green-text {
    color: var(--color-green);
}

.orange-text {
    color: var(--color-orange);
}

/* Navigation Bar */
.navbar {
    background-color: rgba(5, 7, 6, 0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 900;
    padding: 16px 0;
    transition: var(--transition-smooth);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 800;
    font-size: 1.3rem;
}

.logo-icon {
    font-size: 1.5rem;
    color: var(--color-green);
    filter: drop-shadow(0 0 8px var(--color-green-glow));
    animation: pulseGlow 3s infinite alternate;
}

.nav-links {
    display: flex;
    gap: 20px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 20px;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.06);
}

.nav-links a.active {
    border: 1px solid rgba(60, 208, 112, 0.3);
}

.mobile-menu-btn {
    display: none;
    font-size: 1.4rem;
    cursor: pointer;
}

/* User Profile Navigation Widget */
.profile-widget {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 6px 14px;
    border-radius: 30px;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--color-green);
    box-shadow: 0 0 8px var(--color-green-glow);
}

.user-details {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    max-width: 100px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.btn-logout {
    background: none;
    border: none;
    color: #f26868;
    cursor: pointer;
    font-size: 0.95rem;
    transition: var(--transition-smooth);
    padding: 4px;
}

.btn-logout:hover {
    transform: scale(1.15);
    color: #ff3333;
}

/* 🔒 SECURE LOGIN SCREEN */
.login-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: #040605;
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s ease-out, visibility 0.5s ease-out;
    opacity: 0;
    visibility: hidden;
    background-image: radial-gradient(circle at center, rgba(18, 40, 25, 0.4) 0%, #040605 80%);
}

.login-screen.active {
    opacity: 1;
    visibility: visible;
}

.login-card {
    background: rgba(12, 18, 14, 0.82);
    border-radius: 32px;
    border: 1px solid rgba(245, 176, 50, 0.25);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    width: 90%;
    max-width: 480px;
    padding: 50px 40px;
    text-align: center;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6), 0 0 50px rgba(60, 208, 112, 0.1);
    transform: scale(0.95);
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.login-screen.active .login-card {
    transform: scale(1);
}

.login-logo {
    width: 76px;
    height: 76px;
    border-radius: 50%;
    background-color: rgba(60, 208, 112, 0.1);
    border: 1px solid rgba(60, 208, 112, 0.3);
    margin: 0 auto 28px;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 0 15px rgba(60, 208, 112, 0.2);
}

.login-shield-icon {
    font-size: 2.2rem;
    color: var(--color-green);
    animation: rotateShield 6s infinite alternate;
}

.login-card h2 {
    font-size: 1.8rem;
    margin-bottom: 12px;
}

.login-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 35px;
    line-height: 1.5;
}

.btn-google-login {
    background-color: #ffffff;
    color: #333333;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    padding: 15px 30px;
    border-radius: 30px;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    width: 100%;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(255,255,255,0.08), 0 0 12px rgba(60, 208, 112, 0.1);
    transition: var(--transition-smooth);
}

.btn-google-login:hover {
    transform: translateY(-2px);
    background-color: #f7f7f7;
    box-shadow: 0 12px 30px rgba(255,255,255,0.15), 0 0 20px rgba(60, 208, 112, 0.25);
}

.google-icon-img {
    width: 22px;
    height: 22px;
}

.login-footer {
    margin-top: 35px;
    font-size: 0.8rem;
    color: #4a5c51;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 20px;
}

/* Content hiding/showing classes */
.app-content-hidden {
    display: none;
}

.app-content-visible {
    display: block;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 30px;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-green), #2db65c);
    color: var(--bg-darker);
    box-shadow: 0 8px 24px var(--color-green-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(60, 208, 112, 0.5);
}

.btn-secondary {
    background-color: var(--bg-glass);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
}

.btn-orange {
    background: linear-gradient(135deg, var(--color-orange), #d46310);
    color: var(--text-primary);
    box-shadow: 0 8px 24px var(--color-orange-glow);
}

.btn-orange:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(244, 125, 30, 0.5);
}

.btn-block {
    display: flex;
    justify-content: center;
    width: 100%;
}

/* Sections and Headers */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.2rem;
    margin-bottom: 16px;
}

.section-header p {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.1rem;
}

/* Hero Section */
.hero-section {
    padding-top: 180px;
    padding-bottom: 100px;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
    align-items: center;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: rgba(60, 208, 112, 0.08);
    border: 1px solid rgba(60, 208, 112, 0.25);
    color: var(--color-green);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero-content h1 {
    font-size: 3.5rem;
    line-height: 1.15;
    margin-bottom: 24px;
}

.hero-subtitle {
    color: var(--text-secondary);
    font-size: 1.15rem;
    margin-bottom: 40px;
    max-width: 540px;
}

.hero-actions {
    display: flex;
    gap: 20px;
}

/* Hero Visual Animation */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.kiln-stove-showcase {
    position: relative;
    width: 320px;
    height: 320px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.showcase-card {
    position: absolute;
    padding: 24px;
    border-radius: 24px;
    background: var(--bg-card);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
    width: 220px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    transition: var(--transition-smooth);
}

.showcase-card i {
    font-size: 2rem;
    margin-bottom: 12px;
}

.showcase-biochar {
    top: 0;
    left: -20px;
    border-left: 3px solid var(--color-green);
}

.showcase-biochar i {
    color: var(--color-green);
    filter: drop-shadow(0 0 6px var(--color-green-glow));
}

.showcase-oil {
    bottom: 0;
    right: -20px;
    border-right: 3px solid var(--color-orange);
}

.showcase-oil i {
    color: var(--color-orange);
    filter: drop-shadow(0 0 6px var(--color-orange-glow));
}

.showcase-card h4 {
    font-size: 1.1rem;
    margin-bottom: 6px;
}

.showcase-card p {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.showcase-biochar:hover {
    transform: translateY(-8px) rotate(-2deg);
}

.showcase-oil:hover {
    transform: translateY(8px) rotate(2deg);
}

.visual-circle {
    position: absolute;
    width: 250px;
    height: 250px;
    border: 2px dashed rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    animation: rotateCircle 25s infinite linear;
    z-index: -1;
}

/* Gallery Section */
.gallery-section {
    background-color: var(--bg-darker);
}

.cards-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.card-item {
    background: var(--bg-card);
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 15px 35px rgba(0,0,0,0.3);
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
}

.card-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 25px 45px rgba(0,0,0,0.5);
}

.card-wednesday:hover {
    border-color: rgba(60, 208, 112, 0.35);
}

.card-thursday:hover {
    border-color: rgba(244, 125, 30, 0.35);
}

.card-img-container {
    position: relative;
    padding-top: 100%; /* square ratio */
    overflow: hidden;
}

.card-img-container img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.card-item:hover .card-img-container img {
    transform: scale(1.03);
}

.card-info {
    padding: 30px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.day-badge {
    align-self: flex-start;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}

.day-wed {
    background-color: rgba(60, 208, 112, 0.1);
    color: var(--color-green);
    border: 1px solid rgba(60, 208, 112, 0.2);
}

.day-thu {
    background-color: rgba(244, 125, 30, 0.1);
    color: var(--color-orange);
    border: 1px solid rgba(244, 125, 30, 0.2);
}

.card-info h3 {
    font-size: 1.4rem;
}

.card-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    flex-grow: 1;
}

.btn-card-action {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    background-color: rgba(255,255,255,0.05);
    color: var(--text-primary);
    text-decoration: none;
    padding: 12px 20px;
    border-radius: 14px;
    font-weight: 600;
    font-size: 0.9rem;
    border: 1px solid rgba(255,255,255,0.05);
    transition: var(--transition-smooth);
}

.card-wednesday .btn-card-action:hover {
    background-color: var(--color-green);
    color: var(--bg-darker);
    border-color: var(--color-green);
}

.card-thursday .btn-card-action:hover {
    background-color: var(--color-orange);
    color: var(--text-primary);
    border-color: var(--color-orange);
}

/* Calculator Section */
.calc-container {
    background: var(--bg-card);
    border-radius: 28px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 20px 45px rgba(0,0,0,0.3);
    max-width: 900px;
    margin: 0 auto;
    overflow: hidden;
}

.calc-tabs {
    display: flex;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.tab-btn {
    flex: 1;
    background: none;
    border: none;
    padding: 20px;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

.tab-btn:hover {
    color: var(--text-primary);
    background-color: rgba(255,255,255,0.02);
}

.tab-btn.active {
    color: var(--color-green);
    background-color: rgba(60, 208, 112, 0.04);
    box-shadow: inset 0 -3px 0 var(--color-green);
}

.tab-btn:nth-child(2).active {
    color: var(--color-orange);
    background-color: rgba(244, 125, 30, 0.04);
    box-shadow: inset 0 -3px 0 var(--color-orange);
}

.tab-content {
    display: none;
    padding: 40px;
}

.tab-content.active {
    display: block;
}

.calc-form-layout {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 40px;
    align-items: center;
}

.calc-inputs {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-group label {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.input-group input, .input-group textarea {
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 14px 18px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1.05rem;
    outline: none;
    transition: var(--transition-smooth);
}

.input-group input:focus, .input-group textarea:focus {
    border-color: var(--color-green);
    background-color: rgba(255, 255, 255, 0.08);
}

.calc-inputs button {
    margin-top: 10px;
}

.calc-results {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.result-box {
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 18px;
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
}

.result-box.highlighted {
    background: linear-gradient(135deg, rgba(60, 208, 112, 0.08), rgba(245, 176, 50, 0.03));
    border: 1px solid rgba(60, 208, 112, 0.25);
}

.result-box.highlighted-orange {
    background: linear-gradient(135deg, rgba(244, 125, 30, 0.08), rgba(245, 176, 50, 0.03));
    border: 1px solid rgba(244, 125, 30, 0.25);
}

.res-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.res-val {
    font-size: 2.2rem;
    font-weight: 800;
    line-height: 1.2;
}

.highlighted .res-val {
    color: var(--color-green);
}

.highlighted-orange .res-val {
    color: var(--color-orange);
}

.res-unit {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Firebase Section */
.firebase-section {
    background-color: var(--bg-darker);
}

.fb-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.fb-instructions {
    background-color: var(--bg-glass);
    border-radius: 24px;
    padding: 40px;
    border: 1px solid rgba(255, 255, 255, 0.04);
}

.fb-instructions h3 {
    font-size: 1.4rem;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.steps-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    list-style-position: inside;
}

.steps-list li {
    font-size: 1.05rem;
    color: var(--text-secondary);
}

.steps-list strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: 6px;
}

.steps-list code {
    background-color: #050706;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    padding: 8px 12px;
    color: #e09040;
    font-family: monospace;
    font-size: 0.95rem;
    display: block;
    margin-top: 6px;
    width: 100%;
}

.steps-list code.highlight-code {
    border-color: rgba(60, 208, 112, 0.4);
    color: var(--color-green);
}

.steps-list small {
    display: block;
    font-size: 0.85rem;
    color: #667c6f;
    margin-top: 4px;
}

.fb-config-box {
    background-color: var(--bg-glass);
    border-radius: 24px;
    padding: 40px;
    border: 1px solid rgba(255, 255, 255, 0.04);
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.fb-config-box h3 {
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.fb-config-box .desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.fb-status-alert {
    padding: 16px 20px;
    border-radius: 12px;
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
}

.fb-status-alert.connected {
    background-color: rgba(60, 208, 112, 0.08);
    border-color: rgba(60, 208, 112, 0.25);
    color: var(--color-green);
}

.fb-status-alert.error {
    background-color: rgba(230, 80, 80, 0.08);
    border-color: rgba(230, 80, 80, 0.25);
    color: #f26868;
}

/* Footer */
footer {
    background-color: #030403;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 40px 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links a {
    color: var(--color-green);
    text-decoration: none;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition-smooth);
}

.footer-links a:hover {
    color: var(--color-gold);
    text-decoration: underline;
}

/* Keyframes Animations */
@keyframes pulseGlow {
    0% {
        transform: scale(1);
        filter: drop-shadow(0 0 4px var(--color-green-glow));
    }
    100% {
        transform: scale(1.08);
        filter: drop-shadow(0 0 12px rgba(60, 208, 112, 0.6));
    }
}

@keyframes rotateCircle {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes rotateShield {
    0% {
        transform: rotate(-10deg);
    }
    100% {
        transform: rotate(10deg);
    }
}

/* Responsive Breakpoints */
@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 50px;
        text-align: center;
    }
    .hero-content h1 {
        font-size: 2.8rem;
    }
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    .hero-actions {
        justify-content: center;
    }
    .cards-grid {
        grid-template-columns: 1fr;
    }
    .calc-form-layout {
        grid-template-columns: 1fr;
    }
    .fb-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 12px 0;
    }
    .nav-links {
        display: none; /* simple responsive nav placeholder */
    }
    .mobile-menu-btn {
        display: block;
    }
    section {
        padding: 70px 0;
    }
}