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

:root {
    --primary: #FF6B9D;
    --primary-light: #FF9ACD;
    --primary-dark: #E84393;
    --secondary: #6C5CE7;
    --accent: #00CEC9;
    --water-blue: #00B4D8;
    --water-light: #90E0EF;
    --success: #00B894;
    --warning: #FDCB6E;
    --danger: #E17055;
    --light: #FDF6F9;
    --dark: #2D3436;
    --gray: #636E72;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --blur: blur(10px);
}

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    color: var(--dark);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Background Animations */
.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
}

/* Ion Animation */
.ion-animation {
    position: absolute;
    width: 100%;
    height: 100%;
}

.cation, .anion {
    position: absolute;
    font-size: 1.2rem;
    font-weight: bold;
    padding: 8px 12px;
    border-radius: 20px;
    animation: floatUp 15s infinite linear;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.cation {
    background: rgba(0, 180, 216, 0.2);
    color: var(--water-blue);
    border: 2px solid rgba(0, 180, 216, 0.4);
    bottom: -50px;
}

.anion {
    background: rgba(255, 107, 157, 0.2);
    color: var(--primary);
    border: 2px solid rgba(255, 107, 157, 0.4);
    bottom: -50px;
}

/* Flower Animation */
.flower-animation {
    position: absolute;
    width: 100%;
    height: 100%;
}

.flower {
    position: absolute;
    width: 40px;
    height: 40px;
    bottom: -50px;
    animation: floatUp 20s infinite linear;
}

.petal {
    position: absolute;
    width: 20px;
    height: 20px;
    background: var(--primary-light);
    border-radius: 50% 50% 50% 0;
    transform-origin: center;
}

.petal:nth-child(1) { transform: rotate(0deg) translateY(-15px); }
.petal:nth-child(2) { transform: rotate(90deg) translateY(-15px); }
.petal:nth-child(3) { transform: rotate(180deg) translateY(-15px); }
.petal:nth-child(4) { transform: rotate(270deg) translateY(-15px); }

.center {
    position: absolute;
    width: 10px;
    height: 10px;
    background: var(--warning);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* Bubble Animation */
.bubble-animation {
    position: absolute;
    width: 100%;
    height: 100%;
}

.bubble {
    position: absolute;
    width: 20px;
    height: 20px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    bottom: -50px;
    animation: floatUp 12s infinite linear;
}

@keyframes floatUp {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100vh) rotate(360deg);
        opacity: 0;
    }
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    position: relative;
    z-index: 1;
}

/* Glass Card Effect */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    overflow: hidden;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 30px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
}

.logo-icon {
    position: relative;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon i {
    font-size: 3rem;
    color: var(--primary);
    z-index: 2;
    animation: waterDrop 2s infinite;
}

@keyframes waterDrop {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.water-ripple {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px solid var(--primary);
    border-radius: 50%;
    animation: ripple 2s infinite;
}

@keyframes ripple {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

.logo-text h1 {
    font-size: 3rem;
    color: var(--dark);
    font-weight: 700;
}

.logo-text h1 span {
    color: var(--primary);
    font-family: 'Dancing Script', cursive;
    font-weight: 600;
}

.subtitle {
    color: var(--gray);
    font-size: 1.1rem;
    margin-top: 5px;
    font-weight: 500;
}

.tagline-container {
    max-width: 600px;
    margin: 0 auto;
}

.tagline {
    font-size: 1.2rem;
    color: var(--dark);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    padding: 15px 25px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.tagline i {
    color: var(--primary);
}

/* Input Section */
.input-section {
    margin-bottom: 40px;
}

.input-card {
    padding: 40px;
}

.input-header {
    text-align: center;
    margin-bottom: 40px;
}

.input-header h2 {
    font-size: 2rem;
    color: var(--dark);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.input-header h2 i {
    color: var(--primary);
}

.instruction {
    color: var(--gray);
    font-size: 1.1rem;
}

.ph-input-area {
    max-width: 800px;
    margin: 0 auto;
}

.ph-display {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.ph-value-container, .ph-status-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.ph-label {
    font-size: 0.9rem;
    color: var(--gray);
    font-weight: 500;
}

.ph-value {
    font-size: 5rem;
    font-weight: 800;
    color: var(--primary);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
    min-width: 140px;
    text-align: center;
    padding: 20px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    border: 3px solid rgba(255, 255, 255, 0.5);
}

.ph-status {
    padding: 15px 40px;
    background: var(--primary);
    color: white;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.3rem;
    box-shadow: 0 5px 20px rgba(255, 107, 157, 0.3);
    min-width: 180px;
    text-align: center;
}

.ph-controls {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.slider-container {
    background: rgba(255, 255, 255, 0.3);
    padding: 30px;
    border-radius: 20px;
    border: 2px solid rgba(255, 255, 255, 0.4);
}

.ph-scale {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    font-weight: 600;
    font-size: 1rem;
}

.acidic { color: var(--danger); }
.neutral { color: var(--success); }
.alkaline { color: var(--secondary); }

.slider-wrapper {
    position: relative;
    height: 40px;
}

#ph-slider {
    width: 100%;
    height: 40px;
    background: transparent;
    position: relative;
    z-index: 2;
}

#ph-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: white;
    border: 4px solid var(--primary);
    cursor: pointer;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

#ph-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 30px rgba(255, 107, 157, 0.4);
}

.slider-track {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 20px;
    background: linear-gradient(to right, 
        #E17055 0%, 
        #FDCB6E 25%, 
        #00B894 50%, 
        #00CEC9 75%, 
        #6C5CE7 100%);
    border-radius: 10px;
    transform: translateY(-50%);
    overflow: hidden;
}

.slider-fill {
    position: absolute;
    height: 100%;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    transition: all 0.5s ease;
}

.number-controls {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.input-group {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
}

.control-btn {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.5);
    color: var(--dark);
    font-size: 1.8rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.control-btn:hover {
    background: var(--primary);
    color: white;
    transform: scale(1.1);
    border-color: var(--primary);
}

.input-wrapper {
    position: relative;
}

#ph-input {
    width: 200px;
    padding: 25px;
    font-size: 2.5rem;
    font-weight: bold;
    text-align: center;
    background: rgba(255, 255, 255, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 15px;
    color: var(--dark);
    outline: none;
}

.input-label {
    position: absolute;
    top: -25px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.9rem;
    color: var(--gray);
    font-weight: 500;
}

.analyze-btn {
    position: relative;
    padding: 25px 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 15px;
    font-size: 1.3rem;
    font-weight: 600;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.3s ease;
}

.btn-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    position: relative;
    z-index: 2;
}

.btn-wave {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    animation: wave 2s infinite linear;
}

@keyframes wave {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.analyze-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(255, 107, 157, 0.4);
}

/* Results Section */
.results-section {
    display: none;
    animation: fadeIn 0.5s ease;
}

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

/* Result Cards */
.result-card {
    margin-bottom: 40px;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 30px;
    background: linear-gradient(135deg, rgba(255, 107, 157, 0.2), rgba(108, 92, 231, 0.2));
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.card-icon-bg {
    width: 70px;
    height: 70px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-icon-bg i {
    font-size: 2rem;
    color: var(--primary);
}

.header-content h2 {
    font-size: 1.8rem;
    color: var(--dark);
}

.header-content h2 .number {
    display: inline-block;
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 40px;
    margin-right: 15px;
    font-weight: 600;
}

.card-subtitle {
    color: var(--gray);
    font-size: 1rem;
    margin-top: 5px;
}

.card-content {
    padding: 40px;
}

/* Plants Display */
.plants-display {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.plant-section {
    background: rgba(255, 255, 255, 0.2);
    padding: 30px;
    border-radius: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.section-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
}

.icon-wrapper {
    width: 50px;
    height: 50px;
    background: var(--primary-light);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-wrapper i {
    font-size: 1.5rem;
    color: white;
}

.section-header h3 {
    font-size: 1.5rem;
    color: var(--dark);
}

.plant-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 25px;
}

.plant-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    transition: all 0.3s ease;
}

.plant-item:hover {
    transform: translateX(10px);
    background: rgba(255, 255, 255, 0.5);
}

.plant-name {
    font-weight: 600;
    color: var(--dark);
    font-size: 1.1rem;
}

.plant-ph {
    color: var(--primary);
    font-weight: 700;
    font-size: 1rem;
}

.range-display {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 20px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 10px;
}

.range-label {
    color: var(--gray);
    font-weight: 500;
}

.range-value {
    color: var(--primary);
    font-weight: 700;
    font-size: 1.2rem;
}

/* Plant Health */
.plant-health {
    background: linear-gradient(135deg, rgba(0, 184, 148, 0.1), rgba(0, 206, 201, 0.1));
    padding: 30px;
    border-radius: 20px;
    border: 2px solid rgba(0, 184, 148, 0.3);
}

.health-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.health-header i {
    font-size: 1.8rem;
    color: var(--success);
}

.health-header h3 {
    font-size: 1.4rem;
    color: var(--dark);
}

.health-meter {
    margin-bottom: 20px;
}

.meter-bar {
    height: 20px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 10px;
}

.meter-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--danger), var(--warning), var(--success));
    border-radius: 10px;
    transition: width 1s ease;
}

.meter-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--gray);
    font-weight: 500;
}

.health-status {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px;
    background: rgba(0, 184, 148, 0.2);
    border-radius: 10px;
    border-left: 4px solid var(--success);
}

.health-status i {
    color: var(--success);
    font-size: 1.5rem;
}

/* pH Paper Warning */
.ph-paper-warning {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 25px;
    background: linear-gradient(135deg, rgba(253, 203, 110, 0.1), rgba(225, 112, 85, 0.1));
    border-radius: 20px;
    border: 2px solid rgba(253, 203, 110, 0.3);
    margin-bottom: 40px;
}

.warning-icon {
    width: 60px;
    height: 60px;
    background: var(--warning);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.warning-icon i {
    font-size: 1.8rem;
    color: white;
}

.warning-content h3 {
    font-size: 1.3rem;
    color: var(--dark);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.warning-content p {
    color: var(--gray);
    line-height: 1.6;
}

/* Flow Rate Display */
.flow-rate-display {
    background: rgba(255, 255, 255, 0.2);
    padding: 30px;
    border-radius: 20px;
    margin-bottom: 40px;
}

.flow-header {
    text-align: center;
    margin-bottom: 30px;
}

.flow-header h3 {
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.flow-subtitle {
    color: var(--gray);
    font-size: 1.1rem;
}

.flow-subtitle span {
    color: var(--primary);
    font-weight: 700;
}

.rate-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
}

.drops-animation {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.drip-line {
    position: relative;
    width: 200px;
    height: 150px;
}

.drip {
    position: absolute;
    width: 15px;
    height: 15px;
    background: var(--water-blue);
    border-radius: 50% 50% 50% 0;
    transform: rotate(-45deg);
    left: 50%;
    transform: translateX(-50%) rotate(-45deg);
    animation: dripping 3s infinite ease-in-out;
    animation-delay: var(--delay);
}

@keyframes dripping {
    0% {
        top: 0;
        opacity: 0;
        transform: translateX(-50%) rotate(-45deg) scale(1);
    }
    30% {
        opacity: 1;
    }
    100% {
        top: 150px;
        opacity: 0;
        transform: translateX(-50%) rotate(-45deg) scale(0.5);
    }
}

.rate-value {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary);
    text-align: center;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.rate-details {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    width: 100%;
}

.detail {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 15px;
    transition: all 0.3s ease;
}

.detail:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.5);
}

.detail-icon {
    width: 50px;
    height: 50px;
    background: var(--accent);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.detail-icon i {
    font-size: 1.5rem;
    color: white;
}

.detail-label {
    font-size: 0.9rem;
    color: var(--gray);
    margin-bottom: 5px;
}

.detail-value {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--dark);
}

/* Filtration Steps */
.filtration-steps {
    margin-bottom: 40px;
}

.filtration-steps h3 {
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.step-card {
    background: rgba(255, 255, 255, 0.2);
    padding: 25px;
    border-radius: 15px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
}

.step-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.3);
}

.step-number {
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    margin-bottom: 15px;
}

.step-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 10px;
}

.step-description {
    color: var(--gray);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Filter Media */
.filter-media {
    margin-bottom: 40px;
}

.filter-media h3 {
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.media-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.media-tag {
    padding: 12px 25px;
    background: rgba(108, 92, 231, 0.2);
    color: var(--secondary);
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    border: 2px solid rgba(108, 92, 231, 0.4);
    transition: all 0.3s ease;
}

.media-tag:hover {
    background: rgba(108, 92, 231, 0.3);
    transform: translateY(-3px);
}

/* Water Flow Animation */
.water-flow-animation {
    margin-bottom: 40px;
}

.water-flow-animation h3 {
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.animation-container {
    background: rgba(255, 255, 255, 0.2);
    padding: 30px;
    border-radius: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.pipe-system {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 200px;
    margin-bottom: 20px;
    position: relative;
}

.inlet, .outlet {
    width: 120px;
    height: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.water-in, .water-out {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.2rem;
    color: white;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.water-in {
    background: var(--primary);
    animation: pulse 2s infinite;
}

.water-out {
    background: var(--success);
    animation: pulse 2s infinite 0.5s;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.ph-label {
    font-size: 0.9rem;
    color: var(--gray);
    font-weight: 500;
}

.ph-label span {
    color: var(--dark);
    font-weight: 700;
}

.filter-tank {
    flex: 1;
    height: 150px;
    margin: 0 30px;
    background: linear-gradient(to bottom, #e0e0e0, #bdbdbd);
    border-radius: 15px;
    position: relative;
    overflow: hidden;
}

.filter-media-visual {
    position: absolute;
    top: 20px;
    left: 20px;
    right: 20px;
    bottom: 20px;
    background: linear-gradient(45deg, #e67e22, #d35400);
    border-radius: 10px;
    opacity: 0.8;
}

.dripping-water {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 30px;
}

.drip-animation {
    position: absolute;
    width: 20px;
    height: 20px;
    background: var(--water-blue);
    border-radius: 50% 50% 50% 0;
    transform: rotate(-45deg);
    animation: dripFlow 2s infinite ease-in-out;
}

@keyframes dripFlow {
    0% {
        top: 0;
        opacity: 0;
        transform: rotate(-45deg) scale(1);
    }
    30% {
        opacity: 1;
    }
    100% {
        top: 100px;
        opacity: 0;
        transform: rotate(-45deg) scale(0.5);
    }
}

.flow-labels {
    display: flex;
    justify-content: space-between;
    padding: 0 30px;
}

.label {
    font-size: 0.9rem;
    color: var(--gray);
    font-weight: 500;
    text-align: center;
    width: 120px;
}

/* Important Note */
.important-note {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 25px;
    background: linear-gradient(135deg, rgba(255, 107, 157, 0.1), rgba(0, 206, 201, 0.1));
    border-radius: 20px;
    border: 2px solid rgba(255, 107, 157, 0.3);
}

.note-icon {
    width: 60px;
    height: 60px;
    background: var(--primary);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.note-icon i {
    font-size: 1.8rem;
    color: white;
}

.note-content h3 {
    font-size: 1.3rem;
    color: var(--dark);
    margin-bottom: 10px;
}

.note-content p {
    color: var(--gray);
    line-height: 1.6;
}

/* Footer */
.footer {
    margin-top: 60px;
    padding: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    border-top: 2px solid rgba(255, 255, 255, 0.3);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 30px;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
}

.footer-logo i {
    font-size: 2.5rem;
    color: var(--primary);
}

.footer-logo h3 {
    font-size: 1.8rem;
    color: var(--dark);
}

.footer-logo p {
    color: var(--gray);
}

.footer-info {
    text-align: right;
}

.footer-info p {
    color: var(--gray);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
}

.copyright {
    font-size: 0.9rem;
    color: var(--gray);
}

/* Floating Action Button */
.fab {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 5px 20px rgba(255, 107, 157, 0.4);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.fab:hover {
    transform: scale(1.1) rotate(90deg);
    box-shadow: 0 8px 30px rgba(255, 107, 157, 0.6);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .header {
        padding: 30px 20px;
    }
    
    .logo {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .logo-text h1 {
        font-size: 2.2rem;
    }
    
    .tagline {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
    
    .ph-display {
        flex-direction: column;
        gap: 30px;
    }
    
    .ph-value {
        font-size: 4rem;
        min-width: 120px;
    }
    
    .input-group {
        flex-direction: column;
        gap: 15px;
    }
    
    .plants-display {
        grid-template-columns: 1fr;
    }
    
    .rate-details {
        grid-template-columns: 1fr;
    }
    
    .pipe-system {
        flex-direction: column;
        height: auto;
        gap: 30px;
    }
    
    .inlet, .outlet {
        width: 100%;
        height: auto;
    }
    
    .filter-tank {
        width: 100%;
        margin: 20px 0;
    }
    
    .flow-labels {
        flex-direction: column;
        gap: 10px;
        align-items: center;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }
    
    .footer-info {
        text-align: center;
    }
    
    .footer-info p {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .input-card, .card-content {
        padding: 25px;
    }
    
    .card-header {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .rate-value {
        font-size: 2.2rem;
    }
    
    .steps-container {
        grid-template-columns: 1fr;
    }
}