:root {
    --primary: #0056a7; /* RibeirãoNet Blue */
    --primary-light: #3385ff;
    --primary-dark: #003a73;
    --bg-color: #0f172a; /* Sleek dark background */
    --panel-bg: rgba(30, 41, 59, 0.7);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.1);
    --glow: 0 0 20px rgba(0, 86, 167, 0.5);
    --glass-blur: blur(16px);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px 20px;
    position: relative;
    overflow-x: hidden;
}

/* Background Animated Shapes */
.background-shapes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 15s infinite ease-in-out alternate;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--primary);
    top: -100px;
    left: -100px;
    animation-delay: 0s;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: #0ea5e9;
    bottom: -50px;
    right: -50px;
    animation-delay: -5s;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: #3b82f6;
    top: 40%;
    left: 60%;
    animation-delay: -10s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(30px, 50px) scale(1.1); }
}

.container {
    max-width: 1100px;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

/* Header */
.app-header {
    text-align: center;
    animation: fadeInDown 0.8s ease-out;
}

.logo-preview {
    max-width: 200px;
    margin-bottom: 20px;
    filter: drop-shadow(0 4px 6px rgba(0,0,0,0.3));
    border-radius: 8px;
}

.app-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #fff, #93c5fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.app-header p {
    font-size: 1.1rem;
    color: var(--text-muted);
}

/* Main Layout */
.app-main {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 30px;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

@media (max-width: 900px) {
    .app-main {
        grid-template-columns: 1fr;
    }
}

/* Glass Panels */
.glass-panel {
    background: var(--panel-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-panel:hover {
    transform: translateY(-5px);
    box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.6), var(--glow);
}

.section-title {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 25px;
    color: var(--primary-light);
}

.section-title h2 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #fff;
}

/* Form Styles */
#signature-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

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

label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: color 0.3s;
}

input {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 12px 16px;
    color: #fff;
    font-size: 1rem;
    font-family: 'Inter', sans-serif;
    transition: all 0.3s ease;
    outline: none;
}

input::placeholder {
    color: rgba(148, 163, 184, 0.4);
}

input:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(0, 86, 167, 0.3);
    background: rgba(15, 23, 42, 0.8);
}

input:focus + label {
    color: var(--primary-light);
}

/* Preview Section */
.preview-section {
    display: flex;
    flex-direction: column;
}

.preview-box {
    flex: 1;
    margin-bottom: 25px;
}

.browser-mockup {
    background: #ffffff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

.browser-header {
    background: #f1f5f9;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid #e2e8f0;
}

.dots {
    display: flex;
    gap: 6px;
}

.dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dots span:nth-child(1) { background: #ef4444; }
.dots span:nth-child(2) { background: #f59e0b; }
.dots span:nth-child(3) { background: #10b981; }

.url-bar {
    background: #ffffff;
    border-radius: 6px;
    padding: 4px 12px;
    font-size: 0.8rem;
    color: #64748b;
    margin-left: 16px;
    flex: 1;
    text-align: center;
    font-weight: 500;
}

.browser-body {
    padding: 40px 30px;
    background: #ffffff;
    min-height: 200px;
    display: flex;
    align-items: center;
}

/* Actions */
.actions {
    display: flex;
    gap: 15px;
}

.btn {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    padding: 14px 20px;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    box-shadow: 0 4px 15px rgba(0, 86, 167, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 86, 167, 0.6);
}

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
}

.feedback-msg {
    margin-top: 15px;
    text-align: center;
    color: #10b981;
    font-weight: 500;
    font-size: 0.95rem;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
}

.feedback-msg.show {
    opacity: 1;
    transform: translateY(0);
}

/* Animations */
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}