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

:root {
    /* Dark Theme (default) */
    --bg-main: #0F0F0F;
    --bg-container: #151821;
    --bg-sidebar: #1A1D27;
    --bg-header: #141417; 
    --bg-input: #101218;
    --text-primary: #F0F0F0;
    --text-secondary: #B0B0B0;
    --border-color: #2C2C2C;
    --accent-green: #2ECC71;
    --accent-red: #E74C3C;
    --accent-neutral: #7f8c8d;
}
body.light-theme {
    /* Light Theme */
    --bg-main: #F5F7FA;
    --bg-container: #FFFFFF;
    --bg-sidebar: #FFFFFF;
    --bg-header: #FFFFFF;
    --bg-input: #F0F2F5;
    --text-primary: #1A1D27;
    --text-secondary: #657786;
    --border-color: #E1E8ED;
}

@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeOut { from { opacity: 1; } to { opacity: 0; } }
@keyframes pulse {
  0% { transform: scale(1); box-shadow: 0 0 10px rgba(255, 255, 255, 0); }
  50% { transform: scale(1.03); }
  100% { transform: scale(1); box-shadow: 0 0 10px rgba(255, 255, 255, 0); }
}
.is-pulsing.green { animation: pulse 2s infinite; box-shadow: 0 0 20px rgba(46, 204, 113, 0.4); }
.is-pulsing.red { animation: pulse 2s infinite; box-shadow: 0 0 20px rgba(231, 76, 60, 0.4); }
.fade-in { animation: fadeIn 0.5s ease-out forwards; }
.fade-out { animation: fadeOut 0.3s ease-in forwards; }


* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Roboto', sans-serif; background-color: var(--bg-main); color: var(--text-primary); line-height: 1.6; padding-top: 70px; transition: background-color 0.3s ease, color 0.3s ease; }
header { display: flex; justify-content: space-between; align-items: center; padding: 12px 30px; background-color: var(--bg-header); border-bottom: 1px solid var(--border-color); position: fixed; top: 0; left: 0; right: 0; width: 100%; z-index: 1000; transition: background-color 0.3s ease, border-color 0.3s ease; }
.header-logo { font-size: 24px; font-weight: 700; color: var(--text-primary); }
.header-controls { display: flex; align-items: center; gap: 20px; }
.theme-switcher { display: flex; align-items: center; background-color: var(--bg-input); border-radius: 20px; padding: 4px; }
.theme-icon { width: 24px; height: 24px; padding: 5px; border-radius: 50%; cursor: pointer; transition: background-color 0.3s ease, transform 0.2s; filter: invert(0.5); }
body.light-theme .theme-icon { filter: none; }
.theme-icon.active { background-color: var(--accent-green); filter: invert(1) brightness(1.5); }
body.light-theme .theme-icon.active { filter: none; }
.custom-select-wrapper { position: relative; user-select: none; width: 110px; }
.custom-select-trigger { position: relative; display: flex; align-items: center; justify-content: space-between; padding: 8px 12px; font-size: 14px; font-weight: 500; color: var(--text-primary); background: transparent; border: 1px solid var(--border-color); border-radius: 8px; cursor: pointer; }
.custom-options { position: absolute; top: 100%; left: 0; right: 0; background: var(--bg-sidebar); border: 1px solid var(--border-color); border-radius: 8px; margin-top: 4px; z-index: 2; transition: all 0.2s; opacity: 0; visibility: hidden; transform: translateY(-10px); }
.custom-select-wrapper.open .custom-options { opacity: 1; visibility: visible; transform: translateY(0); }
.custom-option { padding: 10px 12px; cursor: pointer; transition: background-color 0.2s; }
.custom-option:hover { background-color: rgba(0,0,0,0.1); }
.arrow { position: relative; height: 10px; width: 10px; }
.arrow::before, .arrow::after { content: ''; position: absolute; bottom: 0px; width: 0.15rem; height: 100%; transition: all 0.2s; background-color: var(--text-secondary); }
.arrow::before { left: -1px; transform: rotate(45deg); }
.arrow::after { left: 4px; transform: rotate(-45deg); }
.custom-select-wrapper.open .arrow::before { left: -1px; transform: rotate(-45deg); }
.custom-select-wrapper.open .arrow::after { left: 4px; transform: rotate(45deg); }

.container { display: flex; flex-direction: row; width: 100%; max-width: 1200px; margin: 0 auto 20px auto; min-height: calc(100vh - 100px); background: var(--bg-container); box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1); border-radius: var(--card-radius); overflow: hidden; transition: background-color 0.3s ease; }
.sidebar { width: 320px; background-color: var(--bg-sidebar); padding: 25px; display: flex; flex-direction: column; border-right: 1px solid var(--border-color); transition: background-color 0.3s ease, border-color 0.3s ease; }
.settings-title { display: flex; align-items: center; gap: 10px; margin-bottom: 25px; }
.settings-title svg { color: var(--accent-green); }
.settings-title h2 { font-size: 20px; font-weight: 500; color: var(--text-primary); }
.type-toggle { display: grid; grid-template-columns: 1fr 1fr; background-color: var(--bg-input); border-radius: 8px; padding: 4px; margin-bottom: 25px; }
.type-toggle button { border: none; background: transparent; color: var(--text-secondary); padding: 8px; border-radius: 6px; font-weight: 500; cursor: pointer; transition: background-color 0.3s ease, color 0.3s ease; }
.type-toggle button.active { background-color: var(--accent-green); color: #fff; }
.input-group { margin-bottom: 25px; }
.input-group label { display: block; margin-bottom: 8px; color: var(--text-secondary); font-size: 14px; font-weight: 500; }
.sidebar select { width: 100%; padding: 12px 15px; background-color: var(--bg-input); color: var(--text-primary); border: 1px solid var(--border-color); border-radius: 8px; font-size: 15px; appearance: none; -webkit-appearance: none; background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23B0B0B0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e"); background-repeat: no-repeat; background-position: right 15px center; background-size: 1em; }
#generate-btn { width: 100%; padding: 15px; background: linear-gradient(90deg, var(--accent-green), #25a25a); color: #fff; border: none; border-radius: 12px; font-weight: 700; font-size: 16px; cursor: pointer; transition: all 0.3s ease; margin-top: auto; }
#generate-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 15px rgba(46, 204, 113, 0.2); }
#generate-btn:disabled { background: #555; cursor: not-allowed; transform: none; box-shadow: none; }
body.light-theme #generate-btn:disabled { background: #ccc; }

.main-content { flex-grow: 1; display: flex; flex-direction: column; padding: 25px; overflow-y: auto; }
.signal-block, .chart-block { background-color: var(--bg-sidebar); border: 1px solid var(--border-color); border-radius: var(--card-radius); margin-bottom: 20px; box-shadow: 0 0 10px rgba(0,0,0,0.05); transition: background-color 0.3s ease, border-color 0.3s ease; }
.signal-header, .chart-header { display: flex; justify-content: space-between; align-items: center; padding: 18px 20px; border-bottom: 1px solid var(--border-color); background-color: var(--bg-input); border-top-left-radius: var(--card-radius); border-top-right-radius: var(--card-radius); transition: background-color 0.3s ease, border-color 0.3s ease; }
.signal-title-wrapper, .chart-title-wrapper { display: flex; align-items: center; gap: 10px; }
.signal-icon, .chart-icon { color: var(--accent-green); }
#signal-time { background-color: var(--accent-green); color: #fff; font-weight: 700; font-size: 14px; padding: 4px 10px; border-radius: 15px; }
body.light-theme #signal-time { color: var(--bg-sidebar); }
.signal-result { padding: 30px 25px; text-align: center; display: flex; flex-direction: column; gap: 25px; min-height: 230px; justify-content: center; }
.signal-placeholder { color: var(--text-secondary); font-size: 16px; opacity: 0.6; }
.signal-loader { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 15px; }
.loader-spinner { width: 40px; height: 40px; border: 4px solid var(--border-color); border-top-color: var(--accent-green); border-radius: 50%; animation: spin 1s linear infinite; }
.loader-text { font-size: 16px; color: var(--text-secondary); }
@keyframes spin { to { transform: rotate(360deg); } }
.signal-active-pair { font-size: 24px; font-weight: 500; }
.signal-action-button { width: 100%; padding: 15px; border-radius: 100px; border: none; font-size: 22px; font-weight: 700; display: flex; align-items: center; justify-content: center; gap: 10px; color: #fff; text-shadow: 0 1px 3px rgba(0,0,0,0.3); }
.signal-action-button.strong-buy { background: linear-gradient(180deg, #2ecc71, #25a25a); }
.signal-action-button.buy { background: linear-gradient(180deg, #27ae60, #1f8a4c); }
.signal-action-button.sell { background: linear-gradient(180deg, #c0392b, #962d22); }
.signal-action-button.strong-sell { background: linear-gradient(180deg, #e74c3c, #c0392b); }
.signal-action-button.neutral { background: linear-gradient(180deg, #95a5a6, #7f8c8d); }
.signal-countdown-wrapper { margin-top: 10px; }
.progress-bar { width: 100%; height: 6px; background-color: var(--bg-input); border-radius: 3px; overflow: hidden; }
.progress-bar-inner { height: 100%; width: 100%; background-color: var(--accent-green); border-radius: 3px; }
#countdown-text { margin-top: 10px; font-size: 14px; color: var(--text-secondary); }
.tech-indicators { border-top: 1px solid var(--border-color); padding-top: 20px; margin-top: 20px; display: flex; flex-direction: column; gap: 10px; }
.indicator { display: flex; justify-content: space-between; align-items: center; font-size: 14px; }
.indicator-name { color: var(--text-secondary); }
.indicator-value { font-weight: 700; }
.indicator-value.green { color: var(--accent-green); }
.indicator-value.red { color: var(--accent-red); }
.indicator-value.neutral { color: var(--accent-neutral); }

.chart-header h2, .signal-header h2 { font-size: 18px; font-weight: 500; }
.chart { height: 400px; background-color: var(--bg-dark); border-radius: 0 0 var(--card-radius) var(--card-radius); }

@media screen and (max-width: 768px) {
    .container { flex-direction: column; background: var(--bg-dark); }
    .sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border-color); }
    #generate-btn { margin-top: 25px; }
    .chart { height: 300px; }
}